Movie where girl starts her period while sitting on boy?

Question

idk my friend keeps talking about this movie where a girl is sitting on a guy's lap, and when she get's up, there's blood on his leg.

?

do you know the movie name?

lol thank you

Answer 1

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Answer 2

Well in Superbad she bleeds on him while they are dancing. Lol. That was funny as h**l.

Answer 3

Superbad

but thats when the girl and the boy are dancing. she isnt sitting sitting on him. its like a sit on him when they're dancing