Reasons for orgasms during sleep. A sexual dream. A wet dream happens when females experience a sexually arousing dream.
You can have a nocturnal orgasm without ejaculation, whereas a wet dream only occurs if you experience involuntary genital secretions while.
As it turns out, during orgasm some women (10-40 per cent) to a glass of water during orgasm, enough to noticeably wet the bed-sheets.
The reason is, when I have an orgasm I always wet the bed which is really embarrassing and I assume it's a turn off for the person I'm with.