sexstories.com
Most Read Sex Stories
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My life at a glance part 1 by lasab
Rated 89%, Read 41715 times, Posted Sun 6th of February 2011
Fiction , Blowjob, Erotica, First Time, Incest, Male / Female Teens, Male / Females, Masturbation, Older Male / Female, Young -
Realising Im a Lesbian. by BiBiLady
Rated 87.5%, Read 41715 times, Posted Fri 18th of March 2011
True Story , First Time, Lesbian, Teen, Teen Female/Teen Female, Virginity, Written by women, Young -
Kalynn ass by Kalynn
Rated 93%, Read 41712 times, Posted Fri 31st of May 2013
True Story -
Slippery Susie - My MILF - Part Three by marshal60
Rated 89.7%, Read 41712 times, Posted Fri 14th of May 2010
Fantasy , Ass to mouth, Ass to pussy, Blowjob, Cheating, Consensual Sex, Cum Swallowing, Erotica, Group Sex, Hardcore, Job/Place-of-work, Masturbation, Mature, Older Female / Males, Oral Sex, Threesome, Toys, Wife -
Forbidden Chapter 2 by Shana
Rated 63.8%, Read 41710 times, Posted Wed 20th of July 2005
Fiction , Blowjob, Cheating, Consensual Sex, First Time, Incest, Male/Teen Female -
Bus Ride Home Part 3 by LaurenofurLabia
Rated 91%, Read 41709 times, Posted Thu 1st of July 2010
Fiction , Bondage and restriction, Female Domination, Group Sex, Lesbian, Spanking, Teen Female/Teen Female, Threesome -
Morning Mom by loadedgun
Rated 89.2%, Read 41709 times, Posted Mon 23rd of May 2011
Fiction -
Mother & son deal with their incest desires by B0redMilf
Rated 90.1%, Read 41706 times, Posted Thu 30th of April 2015
Diary -
Kate, Catherine and Big Black Cocks! Chapter 6 by Unknown user
Rated 70.1%, Read 41706 times, Posted Mon 12th of March 2012
Fantasy , Blackmail, Blowjob, Body modification, Cheating, Coercion, Cruelty, Cum Swallowing, Domination/submission, Exhibitionism, Female Domination, Group Sex, Hardcore, Interracial, Job/Place-of-work, Masturbation, Non-consensual sex, Older Female / Males, Oral Sex, Wife -
My friend Sam's adventure by Kohdok
Rated 68.1%, Read 41705 times, Posted Tue 5th of April 2005
Fiction , Female / Girl, Female/Female, First Time, Lesbian, School, Teen Female/Teen Female -
A tale of Two Gentlemen by Beezlebubzzz
«A loving husband see how far he is willing to go when he invites two friends over»
Rated 92.6%, Read 41703 times, Posted Mon 8th of February 2016
Fantasy , Bi-sexual, Cuckold, Wife -
Old Man Young Tenant Chapter 7 THE END by hotjohn4321
Rated 88.8%, Read 41703 times, Posted Mon 25th of April 2011
Fiction , Enema, Female/Female, Lesbian, Masturbation, Older Male / Female, Threesome, Toys -
Hong Kong Diary (Revised) by Unknown user
Rated 61.9%, Read 41702 times, Posted Mon 8th of January 2007
Fiction , Asian, Hardcore, Male/Teen Female, Oral Sex, Young -
extreme group fucking by biguy181
Rated 73.6%, Read 41700 times, Posted Sun 9th of June 2013
Diary , Anal, Ass to mouth, Ass to pussy, Bi-sexual, Cum Swallowing, Fisting, Gay, Group Sex -
The Retirees Club (06) by NormJohnson
«An unexpected turn»
Rated 94.6%, Read 41700 times, Posted Mon 7th of November 2016
Fiction , Bi-sexual, Gay, Mature -
Panties_(0) by Jamie_M_
Rated 90.5%, Read 41700 times, Posted Fri 6th of April 2012
Fantasy -
Jay and Faith: The Soocer Team (chapter 3) by jwells6995
«Jay a high school teacher and school soccer coach asks his favorite student Faith and some of her friends to help him out by going the soccer team. They might not win every game but Jay will score with some of his favorite players in the locker room after a late game.»
Rated 91.7%, Read 41697 times, Posted Tue 22nd of September 2015
Fantasy , Blowjob, Cum Swallowing, Girls / Female, Group Sex, Job/Place-of-work, Lesbian, Male / Female Teens, Males / Females, Masturbation, Teen, Teen Female/Teen Female, Torture -
Birthday Present_(4) by aquafina clear
Rated 85.5%, Read 41696 times, Posted Sat 21st of April 2007
Fiction , Anal, Cum Swallowing, First Time, Gay, Teen Male / Teen Male -
VIRUS SURGE: Chapters 1 & 2 by Merc098
«what happens when the government gets hold of an alien hybrid.»
Rated 94%, Read 41694 times, Posted Thu 14th of January 2016
Science-Fiction , Alien, Bi-sexual, Body modification, Female/Female, Male/Female -
my wife and the neighbor by bill2007
Rated 53.3%, Read 41693 times, Posted Sat 28th of April 2007
Fiction , Consensual Sex, Wife -
The College Professor by Marilee
Rated 41.6%, Read 41691 times, Posted Wed 10th of March 2004
Fiction , Erotica, School -
The Devil's Pact Chapter 31: The False Miracle (Repost) by mypenname3000
Rated 92.3%, Read 41691 times, Posted Sat 28th of December 2013
Fantasy , Anal, Blowjob, Cum Swallowing, Female solo, Female/Female, Girls / Female, Incest, Lesbian, Male / Females, Males / Female, Masturbation, Mind Control, Oral Sex, Threesome, Toys, Transgendered -
Nerd scores! by TheLonleyGuy
Rated 89.8%, Read 41691 times, Posted Sat 31st of August 2013
True Story , Boys/Teen Female, School -
Monday was great ( Pt 6 ) by 38ddboobs
Rated 87.5%, Read 41688 times, Posted Tue 28th of January 2014
Diary , Anal, Ass to mouth, Ass to pussy, Bestiality, Bi-sexual, Group Sex, Incest, Water Sports/Pissing, Written by women -
Good Girls.. by themadhatter72
Rated 83.8%, Read 41688 times, Posted Fri 20th of January 2012
Fiction , Bi-sexual, Blowjob, Boys/Teen Female, Consensual Sex, Cum Swallowing, Female/Female, Incest, Male / Female Teens, Oral Sex, Threesome -
Two Cousins In The Forest by ItouUno
Rated 63.7%, Read 41688 times, Posted Sun 17th of May 2009
True Story , Anal, Bondage and restriction, Cum Swallowing, First Time, Fisting, Gay, Incest, Oral Sex, Spanking, Teen Male / Teen Male, Toys -
LINGERIE SALESMAN by Plump Plump
Rated 76.9%, Read 41687 times, Posted Wed 11th of February 2004
Fiction , Plumper -
Unwanted attention - Chapter 13 by young_Jasmine
Rated 87.6%, Read 41685 times, Posted Thu 2nd of April 2015
Diary , Authoritarian, Blackmail, Blowjob, Coercion, Cum Swallowing, Non-consensual sex, Older Male / Female, Oral Sex, Teen, Written by women, Young -
One Night in Dallas by retiredinfantryguy
«A young traveling salesman meets an older waitress in a Diner»
Rated 90.8%, Read 41685 times, Posted Sat 11th of October 2025
Fiction , Mature -
Dutch lessons: Ch.1: Free at last by Bo Peep
«My first teenage party since I transferred to a new boarding school in Holland. I’m picked up by a hot teen, or perhaps by three.»
Rated 92.2%, Read 41685 times, Posted Sun 10th of January 2016
True Story , Male / Female Teens, School, Teen, Teen Male/Teen Females, Virginity, Voyeurism, Young -
Fang of Control - chapter 1 of 6 by Limnophile
«A shy and lonely man finds a magical artifact and becomes a potently powerful chick magnet.»
Rated 88.1%, Read 41682 times, Posted Sun 14th of January 2024
Fantasy , Anal, Blowjob, Cheating, Male Domination, Mind Control -
Sally and Billy's Second Date_(0) by Lucky Mann
«Sally and Billy decide to go to the high school game so she can show him off.»
Rated 94.4%, Read 41682 times, Posted Thu 12th of March 2015
Fiction , Blowjob, Consensual Sex, Cum Swallowing, Male/Teen Female, Masturbation, Oral Sex, Romance -
Operation Market garden by Diablo36
Rated 90.4%, Read 41682 times, Posted Wed 11th of June 2008
Fiction , Anal, Blowjob, Consensual Sex, Erotica, Male / Females -
First time tasting cock by Curiouspeter18
Rated 89.3%, Read 41679 times, Posted Mon 20th of May 2013
True Story -
Fun with Mary, part 2 by John Evans
Rated 74%, Read 41679 times, Posted Fri 10th of December 2004
True Story , Anal, Cheating, Exhibitionism, Hardcore -
Iribis, a Demon Unbound by The Midnight Shade
Rated 86.3%, Read 41676 times, Posted Sun 17th of June 2012
Fantasm , Anal, Ass to mouth, BDSM, Blowjob, Cruelty, Cum Swallowing, Death, Hardcore, Horror, Lactation, Monster, Oral Sex, Rape, Torture, Violence -
Queen Yavara: Chapter 4 by White Walls
«Yavara begins her new life, Elena follows close behind. [Rewritten 3/30/19]»
Rated 80.4%, Read 41673 times, Posted Sat 30th of March 2019
Fiction , Anal, Blowjob, Bondage and restriction, Coercion, Consensual Sex, Domination/submission, Teen, Threesome -
I get off with a little help from my cousins by maybunny
«A normal girls night in with my cousin turns into a wild game of lust and pleasure.»
Rated 85.6%, Read 41673 times, Posted Thu 19th of August 2021
True Story , Anal, First Time, Incest, Lesbian, Oral Sex, Teen Female/Teen Female, Written by women -
my uncle - my initiator Part 1 by hornybabli-20_1
Rated 57.1%, Read 41669 times, Posted Tue 12th of July 2005
True Story , Incest -
The Lesbian Debt (Chapter 32) - Office Restructuring by All These Roadworks
«Laura is invited to a party where her and her friends will be the unwilling entertainment.»
Rated 82.8%, Read 41667 times, Posted Sun 4th of September 2016
Fantasm , Blackmail, Domination/submission, Humiliation, Job/Place-of-work, Lesbian, Male/Female, Rape, Water Sports/Pissing -
fucking my best friend_(0) by longdick
Rated 70.4%, Read 41667 times, Posted Sat 8th of July 2006
True Story , Male / Older Female -
Swallowing Justin 5 by jafoman
Rated 92.3%, Read 41664 times, Posted Tue 29th of September 2009
Fiction , Ass to mouth, BDSM, Consensual Sex, Cum Swallowing, Incest, Oral Sex -
Erica, Ranch Wife. pt 7. lost cucumber by del fuego
Rated 91.4%, Read 41664 times, Posted Wed 2nd of September 2009
Fantasy , Anal, Incest, Male/Teen Female, Masturbation, Oral Sex, Young -
After Practice - A Freaky Ass Experience by Emotional4NoReason
Rated 88.2%, Read 41664 times, Posted Tue 21st of June 2011
True Story , Girls / Female, Lesbian, Teen, Teen Female/Teen Female, Written by women, Young -
HELPING OUT HUSBAND'S AIR FORCE BUDDIES by FrameByFrame
«Air Force wife gives husband's buddies a lift back to base, then fucks both of them while her husband is assigned to guard duty for several days.»
Rated 89.3%, Read 41664 times, Posted Mon 24th of October 2022
Fiction , Blowjob, Cheating, Group Sex, Males / Female, Threesome -
Uncle Bubba In The Woods by fbailey
Rated 92.4%, Read 41661 times, Posted Mon 25th of January 2010
Fiction , Consensual Sex, Exhibitionism, Male / Females -
Doctor Who - The Eleventh Doctor - Sex Pollen by hassett fuka
Rated 87.2%, Read 41661 times, Posted Mon 14th of June 2010
Fantasy , Alien, Consensual Sex, Erotica, Interracial, Males / Female, Mind Control, Reluctance -
My new Boy toy by Having2muchfun
Rated 67.3%, Read 41659 times, Posted Sun 23rd of October 2005
True Story , Blowjob, Boy, Erotica -
Little big brother by 123best
Rated 80%, Read 41652 times, Posted Sat 1st of February 2014
True Story , Incest, Male/Teen Female -
Daisy punana ch 5 by AsDiane
Rated 88.6%, Read 41652 times, Posted Sun 4th of March 2012
Fiction , Bestiality, Body modification, Domination/submission, Extreme, Humiliation, Sado-Masochism, Slavery -
brother in-law and I by hotnympho73
Rated 90.6%, Read 41652 times, Posted Sat 10th of November 2012
True Story , Cheating -
how i fucked my sisters part 1_(0) by Unknown user
Rated 78.6%, Read 41652 times, Posted Tue 2nd of April 2013
Science-Fiction -
Real Hazing Chapter 2 by alliedforce
Rated 90.9%, Read 41652 times, Posted Sat 9th of February 2013
Fiction , Anal, Ass to mouth, BDSM, Coercion, Female Domination, First Time, Group Sex, School, Teen Female/Teen Female, Water Sports/Pissing -
The "Fucking" Job - Assignment 1 by A-Nice18x7
Rated 87.7%, Read 41649 times, Posted Thu 24th of February 2011
Fiction , Anal, Ass to mouth, Authoritarian, Blackmail, Blowjob, Coercion, Gay, Hardcore, Non-consensual sex -
The Alice Device (part 1) by AliceDevice
«Parents rekindle their sexual past, with the help of their daughter and dad's special tutoring.»
Rated 92.1%, Read 41646 times, Posted Wed 21st of February 2018
Fantasy , Erotica, Incest, Male / Females, Male Male/Teen Female, Wife -
A Family Betrayal Chapter 30 by Hawkrider
Rated 91.4%, Read 41646 times, Posted Sat 13th of June 2015
Fiction , Asian, Black, Consensual Sex, Cruelty, Death, Drug, Horror, Humiliation, Interracial, Latina, Male / Older Female, Oral Sex, Pregnant, Romance, Torture, Violence -
Wife Trained Abused and Bought Back - ch 02 by AsDiane
Rated 87.7%, Read 41646 times, Posted Wed 30th of May 2012
Fiction , Anal, BDSM, Domination/submission, Extreme, Hardcore, Humiliation, Non-consensual sex, Sado-Masochism, Wife -
Don`t look behind you. by melissa konstans
Rated 58.6%, Read 41644 times, Posted Thu 30th of June 2005
Fantasm , Anal, Death, Older Male / Female, Rape, Teen Male/Teen Female, Torture -
Hot neigbor affair by Frankie3
Rated 63.7%, Read 41643 times, Posted Tue 27th of August 2013
Fantasy , Cheating, Male / Older Female, Voyeurism -
Clarissa, Masters wife, Worker's whore pt1 by abroadsword
Rated 89.6%, Read 41643 times, Posted Sun 2nd of September 2012
Fiction , Cuckold, Discipline, Domination/submission, Males / Female, Prostitution, Reluctance -
Training a Jock Slut Chapter 3 by Philip Faras
Rated 92.1%, Read 41643 times, Posted Sun 26th of July 2015
Fantasm , Authoritarian, Blackmail, Gay, Male Domination -
Mommy's boy. by david Donbavand
«A curious boy finds sex.»
Rated 92.1%, Read 41643 times, Posted Thu 26th of April 2018
Fiction , Consensual Sex, Older Female / Males -
Model turns slut - 3 by artep
Rated 79.6%, Read 41640 times, Posted Thu 8th of June 2006
Fiction , Anal, Consensual Sex, Cum Swallowing, Group Sex, Hardcore, Water Sports/Pissing -
My wife Threesome I by dona.stephe
Rated 80%, Read 41640 times, Posted Tue 10th of March 2009
Fiction , Erotica, Reluctance, Threesome, Wife -
sexy blonde gets fucked up by destroyher
Rated 27.7%, Read 41637 times, Posted Sat 8th of February 2014
Fantasm , Cruelty, Hardcore, Humiliation, Interracial, Non-consensual sex, Prostitution, Rape, Violence -
GWAGOGOO by MISTER BIG T
Rated 57.4%, Read 41636 times, Posted Sun 12th of September 2004
Science-Fiction , Group Sex, Lesbian, Spanking, Transsexual -
Halloween Party_(0) by Krys
Rated 71.3%, Read 41636 times, Posted Sun 12th of September 2004
Fiction , Bi-sexual, Blowjob, Cum Swallowing, Exhibitionism, Oral Sex, Voyeurism -
Seduced by Feet - pt 3 by JP Footguy
Rated 87.8%, Read 41635 times, Posted Thu 24th of November 2005
Fantasy , Consensual Sex, Foot or shoe fetish, Hardcore, Male/Teen Female, Teen, Young -
Who Took My Cherry? - Pt5 by JP Footguy
Rated 88.2%, Read 41634 times, Posted Sun 16th of January 2011
Fiction , Consensual Sex, Foot or shoe fetish, Group Sex, Hardcore, Incest, Male/Teen Female, Pregnant, Teen -
Anything - For Our Big Brother - Chapter 3 / 3 by Limnophile
«Sisters take sexy care of their badly injured big brother.»
Rated 85.3%, Read 41634 times, Posted Sat 11th of November 2023
Fiction , Blowjob, Incest, Male / Female Teens, Non-consensual sex, Reluctance -
My sons in love with me 2 by fuzzybunny-same
Rated 79.4%, Read 41634 times, Posted Fri 15th of July 2011
Fiction , Blackmail, Hardcore, Incest, Teen Male / Female -
The Lesbian Debt (Chapter 39) - The Expose by All These Roadworks
«Laura, now fully conditioned into her new slutty life, takes part in a magazine expose describing her life.»
Rated 89.7%, Read 41634 times, Posted Tue 5th of December 2017
Fantasy , Authoritarian, Humiliation, Incest, Lactation, Lesbian, Male/Female, Mind Control, Water Sports/Pissing -
The Making of a Sissy Boy Slut - The Prequel by martinet1
«Sexually inquisitive teen boy gets caught masturbating by the neighbours whilst babysitting.»
Rated 91.6%, Read 41634 times, Posted Thu 31st of October 2019
Fiction , Anal, Bi-sexual, Boy, Coercion, Discipline, Female Domination, Male / Older Female, Male Domination, Threesome -
Abigail (three chapters) by styxx
Rated 65.2%, Read 41631 times, Posted Fri 4th of July 2008
Fiction , Anal, Ass to mouth, Bi-sexual, Blowjob, Body modification, Bondage and restriction, Consensual Sex, Cum Swallowing, Discipline, Domination/submission, Drug, Erotica, Female / Girl, Group Sex, Masturbation, Oral Sex, Romance, Sado-Masochism -
My wife cheating in bar by slutmilfroxanne
Rated 81.6%, Read 41631 times, Posted Sat 2nd of April 2011
True Story , Cheating, Exhibitionism, Voyeurism -
JEN'S CLUB by blueheatt
Rated 93.2%, Read 41631 times, Posted Wed 10th of June 2015
Fiction , Blowjob, Incest, Masturbation -
Fire Class Going To School by pravus18
Rated 92.3%, Read 41631 times, Posted Wed 10th of April 2013
Fantasy , Non-Erotic, Teen Male/Teen Female -
A guy and his...? 35 Mary by pars001
«A guy discovers a strange bottle upon opening it, finds things quickly begin spiraling out of his control.»
Rated 95%, Read 41625 times, Posted Sun 31st of July 2016
Fantasy , Consensual Sex, Female/Female, Group Sex, Male / Females, Male/Female, Mind Control, Oral Sex, Slavery, Threesome, Violence -
My wait for a promised Blow Job by mosesfishbinder
Rated 81.1%, Read 41625 times, Posted Tue 17th of April 2007
True Story , Anal, Blowjob, Incest, Oral Sex, Toys -
Ed & Holly: Big Brother's Comfort._(7) by Speedinator72
Rated 94.5%, Read 41622 times, Posted Fri 17th of July 2015
Fiction , Consensual Sex, Incest, Older Male / Female, Romance, Virginity -
Watching a Movie With Friends Part 3 by OrianMGS
Rated 94.9%, Read 41616 times, Posted Thu 12th of April 2012
Fiction , Blowjob, Consensual Sex, Cum Swallowing, Teen, Teen Male/Teen Females, Threesome -
Teenage Pornstar_(1) by Italianpride
Rated 59.3%, Read 41607 times, Posted Sun 27th of October 2013
Fiction , Authoritarian, Boy, Consensual Sex, Erotica, Fan fiction, Male/Teen Female, Oral Sex, Romance, Teen Female/Boy, Teen Male / Teen Male, Young -
Me And Sarah by worik brown
Rated 77.9%, Read 41606 times, Posted Wed 7th of June 2006
True Story , Oral Sex, Romance, Teen Male/Teen Female -
OTK and the aftermath by Ricardo
Rated 81.2%, Read 41605 times, Posted Sun 29th of February 2004
Fiction , Spanking -
Pass the Ketchup dear! by SteveX
Rated 79.6%, Read 41604 times, Posted Sat 15th of November 2014
Fantasm , Anal, Bondage and restriction, Cannibalism, Cheating, Cruelty, Death, Domination/submission, Drug, Horror, Humiliation, Non-consensual sex, Torture, Violence -
My Summer Vacation Part 1_(1) by satisfyme1978
Rated 87.4%, Read 41604 times, Posted Sat 24th of September 2011
Fantasy , Incest -
Mamas past out again Chapter 2 by MamasGirl
Rated 90.6%, Read 41604 times, Posted Fri 27th of July 2012
True Story -
Lynn's Next Sexcapade by unusualappetite
Rated 94%, Read 41598 times, Posted Tue 2nd of March 2010
True Story -
My Sister Alice by badforu
Rated 81.3%, Read 41595 times, Posted Sun 11th of September 2011
Fiction -
SECRET ADMIRER by ShadowHeart
Rated 91%, Read 41595 times, Posted Thu 26th of January 2012
Fantasy , Female / Girl, Female Domination, Female solo, Female/Female, Girls domination, Lesbian, Masturbation, Reluctance, Romance, School, Teen Female Solo, Toys -
Fallout: The Untold Adventures by snowman666
Rated 51.6%, Read 41595 times, Posted Wed 28th of September 2011
Fantasm , Blackmail, Blowjob, Fan fiction, Lesbian, Male / Female Teens, Rape, Reluctance, Young -
Tina & Beth by LorenwasLost
«Two young girls get fucked...»
Rated 88.3%, Read 41595 times, Posted Tue 28th of February 2017
Fantasm , Anal, Domination/submission, Male / Female Teens -
Family Fun pt 2 by Switch.Violinist
Rated 85.5%, Read 41595 times, Posted Sun 7th of December 2008
Fiction , Bi-sexual, Bondage and restriction, Consensual Sex, Domination/submission, Female Domination, Female/Female, Humiliation, Incest, Lesbian, Male / Females, Male Domination, Oral Sex, Threesome, Toys -
Down A New Road by Scorp
Rated 85.3%, Read 41594 times, Posted Mon 21st of August 2006
Fiction , Anal, Consensual Sex, Gay, Mature, Oral Sex, Teen -
First Chapter 2 by maryme
«Jill finds more was to explore her new found love of sex.»
Rated 95.4%, Read 41592 times, Posted Sat 3rd of August 2019
Fiction , Blowjob, Male/Teen Female, Oral Sex, Threesome -
The Shoplifter Chapter Two_(0) by Barbiebnympho
Rated 90.2%, Read 41583 times, Posted Sat 25th of April 2015
True Story , Interracial, Pregnant -
Slave Bitches Chapter 1 by Joe Barnosky
Rated 72.6%, Read 41583 times, Posted Tue 11th of September 2012
Fantasy , Anal, Ass to mouth, Ass to pussy, Bestiality, Blowjob, Body modification, Bondage and restriction, Cruelty, Cum Swallowing, Discipline, Domination/submission, Erotica, Humiliation, Non-consensual sex, Oral Sex -
Bounds of Friendship by Pappas
Rated 74.4%, Read 41582 times, Posted Tue 13th of December 2005
Fiction , First Time, Hardcore, Romance, School, Teen Male/Teen Female, Virginity -
Devil's Island CH 6 by snuskhummer11
«This is a long story. The story follows several women from their abduction to their new lives as slaves and beyond.»
Rated 89.5%, Read 41580 times, Posted Fri 27th of July 2018
Diary , BDSM, Bestiality, Body modification, Bondage and restriction, Cruelty, Extreme -
Fat Mike 1 by A-Nice18x7
Rated 85.4%, Read 41580 times, Posted Fri 28th of January 2011
Fiction , Anal, Blowjob, Boy, Cum Swallowing, Domination/submission, Hardcore, Mind Control, Non-consensual sex, Voyeurism