12. Elijah and Marnie Have Sex (Episode 1)
Girls' second season started out with an uncomfortable bang, literally. Of course, it wouldn't be a Girls sex scene unless someone was losing their erection a few feet away from a karaoke machine. The fact that the sex scene was between Hannah's gay ex, Elijah, and her buttoned-up best friend, Marnie, is what lifted it into WTF territory.