Sort by
Relevancy

Free Stories

100%
Philippines Vacation with a Dominant Big Cock Ladyboy
I am still in a state of unbelievable joy that I was lucky enough to experience this but I 100% did and I can’t stop thinking about it as I thought things like this only happen in porn or fantasies. Buckle up because this is a wild one and happened in Manila May 2024. I had the opportunity to vi... Read full Story
AllenB 2024-07-14 2,441 Bareback Creampie Shemale Fucks Guy Big Cock Ladyboy Guy Fucks Shemale cum in mouth domination act filipina ts filipina ladyboy
88%
Very Impatient on a sex fanstay
Are you ready for this Mish?" "Not really but it's too late to back out now." I stood in a dark alley before a metal door shaking with both anxiety and the cold, waiting for the door slot to open and for the night to begin. I wouldn't admit it to my friend Simone but secretly I hoped we would ... Read full Story
ASSEaster5678 2018-07-10 10,760 Shemale Fucks Guy Big Cock Ladyboy Guy Fucks Shemale Mature
100%
Booty call :)
Your cock pounds my ass harder, my cheeks rippling with every deep thrust you give. The sounds of our moans and your balls slapping as you fuck me hard is suddenly broken by the ringing of your phone........... And you wake up. It's 2:30am and I've just finished work. As arranged, I'm giving... Read full Story
BalkanLoco91Ri 2019-08-26 5,237 Teen (18+) Amateur Cumshot Masturbation Bareback Creampie Blowjob Big Cock domination Sex Toys Homemade pov Ass to Mouth cum in mouth
100%
TG girlfriend is my new neighbor
With Christmas and New Year’s over, the weather here in Florida has become cooler, 45 degrees last night and it will be in the mid-sixties for the rest of the week. We live in a sub-division right off the waterway, very private. My neighbor usually comes down around Christmas and stays until tax ti... Read full Story
Jon Paul 2022-01-17 4,131 Big Tits Bareback Creampie Shemale Fucks Guy Big Cock Asian Guy Fucks Shemale
97%
Shemale fucks guy - My gf fucks my slutty ass.
I have a shemale girlfriend & we both are in a relationship. One day, I decide to give her a visit. I'm 5'7 guy & she's 6 feet. That makes her tall & intimidating & whenever we meet, it's me who become her gf. I visit her, she takes me in. SHe pulls me towards her while giving me a deep kiss. I ... Read full Story
glodobox 2020-12-04 22,196 Amateur Creampie Shemale Fucks Guy Fetish Blowjob Big Cock Ladyboy Homemade cum in mouth
96%
Ladyboy surprise in Bankgkok
A few years ago I went to Thailand for the first time, my first stop was the bustling city of Bangkok. I had heard stories about the nightlife, the girls and the tourists. The country had never appealed to me that much but through a twist of fate I ended up visiting the city of sin for a couple of d... Read full Story
Gracemel121 2021-03-25 11,866 Amateur Shemale Fucks Guy Big Cock Asian Ladyboy cum in mouth
91%
Southern Hospitality Ch. 02
XtinaSmith2017 Laura felt herself lifted lazily from the arms of sleep, her body relaxed and floating on a small cloud of pleasure, her mind filled with images, sensations, not pulled from whatever dream she had just been having but instead, memories, memories from the night before. Memories of... Read full Story
Gwapo67 2022-05-16 4,627 Bareback Creampie Shemale Fucks Guy Big Cock Mature
95%
My TS Journey
I'm a straight, married guy in my 30's, at least that how I appear to everyone that knows me. I have an intense obsession with Trans women that I have been indulging since I was a teenager. Over the years this fixation has grown into something that ranged from watching porn initially, to having my a... Read full Story
iconicirish 2022-10-26 8,228 Amateur Shemale Fucks Guy Big Cock domination cum in mouth escort ts
100%
Fooled Into Love by a Beautiful Transexual
A fictional, steamy love story about a Man’s first experience with a Shemale... a real take charge kinda girl! Maria Lopez was an absolutely stunning 23 yr old Puerto Rican Goddess. I remember the first time I laid eyes on her, bent over inside her hatchback Toyota, pulling out a hanging fern pla... Read full Story
Oobatz 2018-07-24 12,643 Small Tits Amateur Cumshot Bareback Shemale Fucks Guy Big Cock domination cum in mouth
80%
Fucked by Priscilla Gaucha
This black woman always drove me crazy, I always liked her photos and videos on the internet. Unfortunately, when I had the courage to face it, she moved out of state and ended up being left in the lurch. However, one night driving by, I came across her. She was beautiful, strong thighs, well made-... Read full Story
mauricioportoalegre 2024-05-09 3,164 anal Amateur Shemale Fucks Guy Big Cock Ebony
50%
The BIG COCK that I will eat.
ENGLISH: Hello friends. In the link below, you can see the tranny cock that will fuck me in the days to come. I saw her advertised on the internet, I picked up the phone and called, I will see her when her clinical tests are negative for sexually transmitted diseases, because I will surely swallow... Read full Story
cuchillo 2020-09-18 7,693 Amateur Cumshot Latina Shemale Fucks Guy Blowjob Big Cock Homemade cum in mouth brunette ts swallow cum
90%
Nicole
This story is about my first time with a transgender. I had no previous experience with a transgender until 35. This happened on a Saturday morning when I was walking in the streets of Tokyo and I saw this foreigner woman and she seemed to be lost. As an English speaker and not knowing that she was ... Read full Story
cttyy 2019-11-16 17,337 Shemale Fucks Guy Big Cock domination cum in mouth
90%
My Tgirl lover
This is my first attempt at writing one off these stories so if you like it than please let me know and I'll look into writing another one also any feedback would be welcome My names Phil, I'm 28 and I currently live with my girlfriend with whom I've been dating for several years. U... Read full Story
Maillihp 2017-05-15 9,407 Bareback Shemale Fucks Guy Big Cock
93%
Loving TS Sex
living in a medium size city 30 years ago, it was necessary to stay into the closet. That way of live is really still the reason why I never outed myself, even after years living in different bigger cities and several countries. I had acquired a taste for transsexuals, considering them the best o... Read full Story
shemale lover 2013-12-08 4,850 tranny sucking Shemale Fucks Guy ass fucking condom sex
100%
Big Dick Alessia Visits Dallas
Alessia Hung Mature MILF travels to visit a Big Dicked Man and his Sexy Household If you like Transexuals, big cocks, bondage, BBWs, big clits, deep throat, fisting, 69, ass fucking, sounding, piercing, cum swallowing and big loads this story is for you. If not don't bother reading. If you fav... Read full Story
darrell 2022-04-20 4,340 Group Sex Cumshot Shemale Fucks Guy Blowjob blonde Big Cock Asian Shemale and Girl Sex Toys Mature Ass to Mouth shemale + shemale
100%
Sissy Femboy Chrissy in Drag at the Club
"Can you wear a dress tonight?" "I can't crossdress in public, I'm not 'out' and don't want to be seen that way." "That's okay. We're going to a gay-only club that has a drag queen show tonight, so you'd fit right in." "Cool, but I'll have to change when we get there." "Awesome! See you tonight!... Read full Story
Chrissy Tunnell 2022-02-03 5,050 Crossdresser Amateur Bareback Shemale Fucks Guy Fetish Blowjob Ladyboy Lingerie domination Guy Fucks Shemale Mature Homemade cum in mouth
100%
I Give Up
The following story is the first of four parts of a tale that explores the theme of transformation. It is thematically similar others that I have submitted but has a larger narrative arc. I hope you enjoy reading the first portion, Act One & Two. I continue to work on better editing and someone h... Read full Story
ASSEaster5678 2018-09-14 9,095 Cumshot Bareback Shemale Fucks Guy Big Cock Ladyboy
33%
My new Experience with Amy Cute Shemale in Pune
Hi friends i am back with new story. I am mad shemale lover. and keep on finding new shemales for me. This time i got new website to search for shemale www.massagerepublic.com I saw an advertisement of Amy and i liked her. called her and fixed appointment. went to her hotel, which was ok ok ... Read full Story
Stud4Shemale 2021-02-20 6,131 Cumshot Bareback Creampie Shemale Fucks Guy Blowjob Asian Guy Fucks Shemale shemale fucks man man-fucking-shemale Indian Shemale Pune
100%
Big cock heaven.
I live in Vancouver and saw a beautiful trans escort online and couldn’t resist setting up a meeting. I met her at a hotel and she was just as beautiful in person as online. She was Asian and had the most wonderful big tits and ass. Her cock was a solid 8 inches, uncut with a big mushroom head, whic... Read full Story
Eyecandy64 2024-02-06 6,274 anal Bareback Creampie Shemale Fucks Guy Blowjob Big Cock Asian
94%
My first Shemale
“Curious? Bi?” Well, yes, but only with a shemale. Beyond that I’m a firmly planted heterosexual. For many years I longed to have sex with a shemale but never did anything about it. (I’m not much of an initiator). The community I live in has lots of shemale beauts; maybe that started my intere... Read full Story
SachinJoy 2018-10-04 32,611 Cumshot Shemale Fucks Guy Blowjob Big Cock Ladyboy cum in mouth
50%
lust of a sex-agenarian nana-pops
Frenzied lust of a sex-agenarian nana-pops; between dream and reality I had never fantasized of a manly man, even after offering my virginity; to a fabulous sissy. Before my new Era, my fantasy preferences were always with glabrous he-she’s, same about my relationships after… BUT BUT BUT… My last t... Read full Story
hippocampus_171 2023-07-09 4,698 anal Small Tits Amateur Group Sex Masturbation Guy Fucks Shemale Sex Toys Mature small cock big ass sissy femboy
100%
Natacha's dungeon,
Natacha's dungeon, For a long time, I have loved wearing lingerie because it always gives me so much excitement to contemplate myself as a woman in front of my mirror. I learned a long time ago to memorize feminine gestures and attitudes while perched on my pumps. I also know how to put on ma... Read full Story
sandratvtg 2024-06-24 1,218 anal Stockings Shemale Fucks Guy Fetish Lingerie domination Sex Toys femboy chastity cage plug urétral
100%
Roberta, Molly and Ed
Friday "Commander Cromartie?" Lt. Commander Edward Cromartie, USN, turned toward the voice that had spoken his name. He saw two female naval officers, a tall willowy light-skin Black woman, and a short Asian one. The Black one was wearing the uniform of a full commander, the Asian of... Read full Story
shemale lover 2012-09-04 5,342 Cumshot threesome Blowjob Big Cock condom sex
94%
My Shemale Fantasy
Allow me to introduce myself, i’m a young European man, in my early twenties, writing my first erotic story. This has been a fantasy all my life, it probably will remain a fantasy, but that doesnt mean i cant write about it. Ever since i was old enough to realize my raising sexual interest and... Read full Story
Jakester 2013-04-10 31,697 first time Creampie Shemale Fucks Guy ass licking virgin
100%
Surprise Ending (Part Three)
I rolled my dick around her hole to spread the precum off it and lubricate it. The feeling was sensational and I couldn't spend much time easing my way in --I shoved right in the the hilt in one steady push. Karla practically jumped off the couch and screamed. I thought maybe I had hurt her (I am... Read full Story
Chantel13 2022-08-23 4,324 Crossdresser Amateur Group Sex Cumshot Outdoor Creampie Shemale Fucks Guy Big Cock Shemale and Girl redhead Guy Fucks Shemale Ass to Mouth
100%
HOW ONE PEEPING TOM MORNING TURNED ME INTO A SHEMALE SISSY BITCH
It was while cutting across his back trailer park lawn around 7pm on misty July Saturday evening, when I first discovered that Mr. Parker was really a fag. How else could you describe a man wearing a long blonde wig on his head while below he wore only a large somehow stuffed pink lacey woman's bra ... Read full Story
CDDIXIE4U 2019-01-08 13,877 Teen (18+) Crossdresser Amateur Cumshot Masturbation Blowjob Big Cock Ladyboy Lingerie domination Guy Fucks Shemale Homemade Compilation Vintage cum in mouth
85%
Francine Hung Shemale
This is the story of "Francine" a Transgender woman from California. She and Jonathan meet in a Tucson resort two weeks after their first weekend together. Note from Francine-Thank you Mrstanley for writing and submitting my story. In real life I live and work in California and Mexico as ... Read full Story
darrell 2015-11-16 9,444 sucking Big Cock ass fucking deep throat butt plug
100%
Crossdresser Caught in Act
I do not consider myself gay, nor do I think I am bisexual, but I do enjoy a nice big cock. I am not attracted to men at all and under normal circumstances find any and all homosexual activities quite disgusting, until I get really horny that is. When I get all hot and hard, I can't help but want a ... Read full Story
shemale lover 2012-03-31 5,656 Masturbation Sex Toys crossdressing vibrator
100%
Salacious Sarah
Joe Dodge walked down bustling Market Street in Philadelphia in awe. Joe and his wife Tammy moved here 4 months ago from a small town in Alabama. The 24 year old man missed his hometown but at the same time he marveled at the sights in the big city. It was Friday evening, he always went straight hom... Read full Story
shemale lover 2012-05-07 4,906 shemale Big Cock oral sex cum licking
66%
My girlish desires
My girlish desires, I am happy to spend my weekend at home to live my life as a woman. I apply a depilatory cream to my body, which I leave to act for a few minutes before going in the shower. I take this opportunity to do an enema to avoid unpleasant surprises during my girl games. Then, using ... Read full Story
sandratvtg 2023-01-19 3,990 Stockings solo Cumshot Creampie Fetish Big Cock Lingerie Sex Toys
94%
My first shemale
This is the story of my first she male. I had always been curious about dicks. I had always been attracted to women and I loved to watch a woman get pounded by a big cock. But after awhile I realized that when I tried to imagine the porno, I always imagined myself in place of the girl. One day, when... Read full Story
shemale lover 2012-02-12 13,270 first time Creampie Shemale Fucks Guy
91%
HOW MY AUNT AND SISSY NEPHEW CHANGED MY LIFE FOREVER! (fictional
It was the very first night of my month long North Carolina July summer vacation stay when my Aunt Meg suddenly entered the bedroom that I was temporarily sharing with my younger cousin Rudy. Being so openly effeminine in his body language,voice and looks, I had already planted such dirty thoughts ... Read full Story
CDDIXIE4U 2019-01-08 33,796 Teen (18+) Crossdresser Cumshot Masturbation Bareback Shemale Fucks Guy Fetish Blowjob Big Cock Ladyboy Lingerie domination Homemade Compilation cum in mouth shemale + shemale
91%
My wife found out I also love cock
Even though I've been a tranny lover since I was 18 I ended up marrying Barb she had a set of tits and an ass built for speed. I never told her about my past nor did I pump her for her past. We had been married for a couple of months when I got that need for big black cock again so while Barb slept ... Read full Story
In Need Of Some Huge Black Cock 2019-04-30 9,244 Stockings Big Tits Creampie Big Cock cum in mouth double anal
100%
FAIT POUR OBÉIR ⚧️ ⚧️
Mettons les choses au clair. Je ne suis pas gay, pas une poule mouillée ou un pédé, je suis un hétérosexuel normal de 30 ans, d'accord ! Alors pourquoi vous demandez vous si j'écris ceci vêtue d'une robe bleu foncé, de bas noirs avec porte-jarretelles, d'une culotte bleu clair avec un motif à pois b... Read full Story
Femboy 2021 2023-03-26 1,056 Stockings Blowjob Big Cock Lingerie Sex Toys humiliation cum in mouth feminisation forcé poule mouillé SOEUR DOMINANTE chasteté forcé Féllation forcée
100%
sex-agenarian's onanic lust
An onanic lust of a sex-agenarian that I am; I'M IN BIG HEAT; it's the season of bodily reunions in nature... I'm like an elephant(e) waiting to be satisfied. My cloaca is starting to titillate at the mere sight (look hah!) of a guy's swollen crotch on the street... I activated all my sensors to sa... Read full Story
hippocampus_171 2024-03-09 4,174 anal solo Amateur Masturbation Creampie Sex Toys Mature small cock
64%
Big Cock Heaven
This story is written from the Shemale's point of view. "Jane" is based on a real Transgender woman from California & my friend. She gave me the outline of a meeting she had with "Janardhan." ***** My name is Jane and I am a natural red head blue eyed 34 year old T... Read full Story
sach 2015-11-16 7,337 Big Cock ass licking redhead rimming Shemale on Guy
100%
Fuck Friends Forever
"Flip over..." Those two words come as a surprise, filling my mind with expectations. I find it interesting that Brian wants to switch from doggie style to a more traditional sex position, a romantic one at that. Hopefully, he won't be turned off if he sees my cock while we're having sex. I hope... Read full Story
ASSEaster5678 2019-01-09 8,798 Bareback Shemale Fucks Guy Big Cock Guy Fucks Shemale
92%
Real Story with a Shemale Escort
One day I dreamt about a big black cock fucking me on doggy style. The dream felt so real that it made me to ejaculated in my sleep without even touching my cock. It was the first time this happened to me and I was surprised because I’d never felt gay. My underwear became a mess filling the whole su... Read full Story
GusDark 2023-08-28 7,923 Shemale Fucks Guy Blowjob cum in mouth Handsfree cum real life Cheating wife
95%
Three for Fun
I was on my way home from the bar one night when I noticed a group of ladies standing on the corner talking. As I approached one yelled, “hey sexy looking for the time of your life?” I stop for a minute and stare at the three beauties in front of me. “Well the time of my life does ... Read full Story
shemale lover 2012-03-26 7,089 Big Cock oral sex cum swallowing fisting
100%
Blossoming Shemale
My name was James. It was, before everything that happened, anyway. I'd come from pretty good stock, as the snooty, upper class would likely say. I guess I still did, although it would take a DNA test to prove it now, and to be honest, I didn't really have the desire. That was all before. I have to ... Read full Story
shemale lover 2012-08-01 5,011 Cumshot shemale Big Cock oral sex
100%
Incubator
For lack of a better term, I will call him my Lover. I call him Grae, which sounds like "gray" if you are doing a rather poor impersonation of a Scotsman. Not that I have anything against the Scots; that's just as close as I have been able to come to pronouncing his real name. You would think that s... Read full Story
ASSEaster5678 2019-04-23 4,567 Big Tits Bareback Shemale Fucks Guy Big Cock Guy Fucks Shemale monster
100%
Birthday Surprise
It has taken me months to plan everything. It hasn't been easy to make the arrangements without him finding out but I think I have managed to pull it off. I have planned what I think will be the perfect birthday surprise for him. Today, when he gets home he will find a note with instructions. Happy ... Read full Story
shemale lover 2012-06-20 4,585 anal sex Creampie Big Cock oral sex
92%
Shemale feet
Hi, im a 20 year old european guy with a true great story I wanted to share with you people. It all happened on a warm but rainy day in the summer, was single at that time. I broke up with my girlfriend because we didnt came along anymore. Anyway, I was bored, not to many options and everyone els... Read full Story
Antwerptslover 2014-12-03 8,738 first time ass shemale Big Cock feet
88%
Shemale Ride Along (Part 3)
It was the last day of classes. All of the finals were finished, and everyone was celebrating. My finals had been particularly rough. It was the last semester of my freshman year and I didn't study as much as I should have. The problem was that I lived next door to a girl that I had been having... Read full Story
qtball 2016-09-26 21,453 anal tranny Blowjob Big Cock bj Ass to Mouth
92%
Nicole and I the final chapter
So I haven’t written any stories in a while , so if you read mine before you should like this one I didn’t write it yet cause it’s about my last encounter with Nicole. Very sad day for me lol but a very good story. So here goes........ Nicole and I had been going over a year now and everythi... Read full Story
Duke04 2018-03-07 4,298 Stockings Blowjob Big Cock redhead Sex Toys Ass to Mouth cum in mouth
100%
Catching up with the biggest cock
I have recently written with an account from my diary about the biggest cock that I’ve ever seen and someone saw the experience and wanted to know more as I had said that I met him a few times. So, I can bring that right up to date now because I have recently been to see him again. But let me go bac... Read full Story
lkusex 2021-06-03 10,787 Masturbation Big Cock Ladyboy domination self sucking Ass to Mouth Vintage
100%
Oneness with the bodies
many years went into just fantasizing being with shemales. I was getting hornier day by day to try it out. But being in a relationship there was hardly any room or time for it. I once experienced it in bangkok and confirmed that I really can do it and actually love it. One day suddenly it was br... Read full Story
zyankhaan786 2023-05-30 6,446 Group Sex Bareback Shemale Fucks Guy Big Cock domination big ass cum in mouth double anal
100%
Hung Shemale has Motorcycle Trouble near Vegas
I drive down a deserted two- lane highway outside of Las Vegas, Nevada. It is August and the temperature is well over 100 degrees. In the distance, I see a tall beautiful mature creature that walks alongside the road. As I pull over, I am stunned by her powerful physique. She sports an incredibly ti... Read full Story
darrell 2024-02-02 5,432 Shemale Fucks Guy Blowjob blonde Big Cock Mature deepthroat cum in mouth toe sucking Fisting Anal
79%
My Shemale Stepmother Part 1
My parents split up when I was eighteen, I was a little distressed by it but we had never been as close as some. Still, I didn't really see what had driven them apart so quickly and so thoroughly that they never even spoke any more. I guessed maybe one of them must have had an affair and that was re... Read full Story
shemale lover 2011-09-01 18,910 tranny Big Cock jerking off
93%
SHEMALE SEX IS THE BEST
I had been in sex with gays for 1 year, but had always been intrigued by those hot looking chicks who packed more than a pussy between their legs. I had no idea where to find one in Kanpur I was definitely bi-sexual, still seeing whores, and still going to gloryholes for my cocksucking needs. I w... Read full Story
shemale lover 2014-03-07 4,717 tranny Big Cock ass licking doggy style big boobs rimming
94%
Shemale Ride Along Part 1
I'm going go ahead and get this out of the way. During my freshman year of college, I was confused about my sexuality. It sounds strange saying this right after calling myself confused, but I loved girls. I really did. I loved all of their shapes and curves. I loved tits, pussy and ass. Now... Read full Story
qtball 2016-08-29 12,458 anal tranny Blowjob Big Cock bj asstomouth
100%
A Perfect Pandemic: A Transsexual Transition in a Troubled Time
A Perfect Pandemic A Transsexual Transition in a Troubled Time A Novelette by Alexandra Rios Text Copyright Reserved © August, 2021 Dedication Transgender Day of Remembrance is a solemn occasion. I am offering “A Perfect Pandemic” for free as an antidote to the fear, phobia, discrimination, d... Read full Story
the greatest liar 2021-11-16 5,147 Teen (18+) Crossdresser Group Sex Big Tits Bareback Creampie Big Cock gangbang domination Guy Fucks Shemale Interracial double anal webcams
100%
Hung Trans Lesbians Fuck Two Ladyboys
Note 1: If you like Transsexuals, Trans Lesbians, Asian Ladyboys, Big Cocks, Extreme Cock Sucking, Anal Fucking, Anal Fisting, Semen Swallowing, Role Play, Orgies, BDSM, Cock Sounding and Foot Fetish this story is for you. Note 2: All the characters are over 21. The names are fictitious, but some... Read full Story
darrell 2022-01-03 4,337 Group Sex Big Tits Cumshot Bareback Fetish Blowjob Big Cock Asian Ladyboy Sex Toys Mature cum in mouth shemale + shemale
100%
Sissy Femboy Chrissy in Drag 2: At the Apartment
This is Part 2 to the article I wrote called "Sissy Femboy Chrissy in Drag at the Club." In that story I explained how I am 41 but look, feel and sound younger, that I shave myself smooth and like dressing in gurly panties and other female clothes to be a sissy femboy for older guys. A guy I met on ... Read full Story
Chrissy Tunnell 2022-02-03 3,601 Crossdresser Amateur Bareback Creampie Fetish Blowjob Ladyboy Lingerie domination Guy Fucks Shemale Mature
85%
My Awkward Phase
My Awkward Phase ©Alexandra Rios 2019 The greatest lie is that what happens in high school doesn't matter, because life begins in college. I pretended to agree, although I never believed it, for I was the world's greatest liar. Wannabees I was hanging out with my friends Quinn, Barb and Anne ... Read full Story
the greatest liar 2019-06-14 11,857 Small Tits anal sex Latina Masturbation Bareback Creampie Blowjob Big Cock transformation gangbang Shemale and Girl Guy Fucks Shemale Sex Toys Ass to Mouth cosplay hormones high school real life situations
100%
How A straight tatted white guy turned me out to a femboy
So I met this straight white guy on an app (wont say) hes tatted a bit thuggish and likes black femboys I noticed. At that time in my life I really didnt embrace being femme I was kinda in the middle doing the cute gay twink boy thing. He didnt mind me presenting male he did like black guys or femme... Read full Story
Ezra_Kyle25 2024-07-18 1,063 Crossdresser Amateur Ebony domination Guy Fucks Shemale Interracial big ass Homemade sissy femboy interracial fuck