I saw the 40 Year Old Virgin the other day with my girlfriend and two friends. It's funny, because all the virgins in the audience never laugh at the sex jokes, while the couples do. Half of the theatre is just sitting in semi-awkward silence with boners while the other half laughs vigorously.

I thought the premise of the movie was ridiculous enough, but actually the humor is very rarely taken from that.. it's more from the outlandishly stereotypical behaviors and scenarios between the characters in the movie. All in all it was far more hilarious than I was expecting, and I was pleasantly surprised.