A man pulls a woman's underwear down; revealing her bare buttocks. She then starts farting before the scene ends.
In a later scene, a man makes an inappropriate analogy of the theory of relativity; comparing it to sticking his fingers up an older woman's bottom.
There is also an undetailed scene of masturbation and attempted self-fellatio. In which a man whose trousers is seen around his ankles moved his head towards his crotch; later in the scene his mother walks in the room and it was implied he was masturbating.
Some characters mention putting their hands up women's skirts.