Speaking of jizz...
I dated a girl who always slept nude; and after sex she would just roll over and go to sleep with my jizz still inside of her. She said she liked the feeling of jizz slowly leaking out of her as she fell asleep. I thought it was weird...and bad for my sheets.
It takes all kinds...
My wife will occasionally sleep nude - or topless/bottomless - depending on how hot she is after bathing. Her reasoning for not always just sleeping nude: she often falls asleep on top of the sheets, and when she wakes up naked and spread eagled, she says it makes her feel "exposed." Considering the fact that we are nudists and she's very often "exposed" at the resort; her logic makes no sense.