The opening scene of 'Bridesmaids' contains one of the most instantly memorable sex scenes of all time. We know Jon Hamm best as the slick and suave Don Draper on 'Mad Men,' but writer and star Kristen Wiig wisely casts him as a guy who's incredibly attractive but the equivalent of tone deaf when it comes to sex. He's completely sexually incompatible with Wiig's character, but she keeps going back to him because he's just so damn sexy. The pair get into some horribly awkward positions, make ridiculous faces, and have sex with each other with all the grace of seizure victims.

More From ScreenCrush