There are three mentions of "nipples" throughout the entire film.
A woman falls on a man and kisses him twice before her tells her to get off.
A few scenes suggesting methods of obtaining sperm samples.
An erotic video is glimpsed, with models in skimpy clothing.
A man and woman kiss and discuss sex.
Discussions of sex and reproduction throughout the film.
A man and woman are interrupted while they're making out on a couch.
A woman suggests a o a man that have sex, which occurs offscreen. She is shown dressing after, but no nudity.