Have you guys ever seen this website? Its not dirty like you would think... its a series of videos about mating habits of different critters. It sounds boring and strange, I know, but they are really funny and worth watching.
Ha haha, the first thing that came to my mind when I saw the title of this thread was this movie we watched in my college "Psychology of Human Sexuality" class--it was called "LoveFrogs" and it was two stuffed animal frogs having relations. It was hysterical--meant to be an icebreaker, of course.