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1. The act of being conflicted between engaging in sex and sleep. 2. The act of having sex while asleep (but yet still consensual).
Bernard has had a long day at work and is exhausted. He goes to sleep yet wants "affection" from his fine ass women. While asleep he moves her hand over his penis with a movement that says stroke me and then begins to snore. He is sleep sexing again. Girl, my man was sleep sexing again.
Sleep sex by La'Reesha July 18, 2015
Related Words
To reply to a text received while asleep. Usually one word answers or nonsensical responses occur, with misspellings.

Much like sleepwalking, the sleep-texter will not remember the incident until the morning after, upon checking thier sent/inbox.
1. Friend of sleeptexter:"Hey, you're missing an awesome party right now!"

Sleeptexter's response: "Mm yeahg i knsh."

2. "Yeah, I tried texting her last night but she was just sleeptexting back, so it was useless."
Sleeptext by mousefacee December 8, 2009
the act of sleeping naked next to your best friend and he/she is also naked and you wake up in the morning and find her or him on top of u with the penis inserted into the pussy.
i woke up with my best friends dick in me and we dont know how it got there damn that sleep sex
sleep sex by jpotts93 August 6, 2009

sleepysex 

Somnophilia. A fetish in which a person fantasizes about having sex with somebody who is unconscious at the time.

This is different from necrophilia in that the object is still alive at the time of intercourse.
"Don't pass out in front of him."
"Why not?"
"Really into sleepysex, that one."
sleepysex by the letter d November 13, 2007

Sleepsexual 

Being attracted to sleep, it doesn't have to be sexual or anything bro, I just prefer sleeping.
Person 1: Are you straight?
Person 2: nah bro I'm sleepsexual
Person 1: tf is that?
Person 2: urban dictionary it
Sleepsexual by eybp February 4, 2021
Sleep sex, or sexsomnia, is having sex while you're asleep. It is related to sleepwalking or sleep eating. The person who does it has no recollection of it in the morning, though they may have a feeling of sexual satisfaction.

Little is known about it, as there needs to be more research on it, but it seems to occur most often in people who have suppressed their need to have sex during the day, or who have an unfulfilled love for someone.

Because of the proximity of other sleeping family members, father-daughter or brother-sister coupling may result. It is dangerous to wake a sleepwalker, so the best method of handling the situation is usually to simply wait until it is over.
My brother walks in his sleep, and lately he has been getting into my bed. I'm wondering if he's going to start having sleep sex one of these nights.

I woke up in the morning feeling wet between my thighs, and a large wet patch on the bed. I'm wondering if I indulged in sleep sex during the night.

In the morning I woke up in my father's bed, feeling as though I had just had sleep sex. My father had my lipstick smeared on his lips and cheek, but he does not have any memory of it.
Sleep sex by Group of Friends June 12, 2011