indexed.blogspot.com is a fantastic site that my friend Jenn recommended. It consists of simple, self explanatory and funny venn diagrams and graphs depicting humorous social theories. I'm not doing justice with the description so just go visit it!.
P.S. I'd love to buy a T-shirt but the graphic on the shirt appears a little small plus I have way too many T-shirts as it is (from various running races I've participated in). It appears that the author, Jessica Hagy, has a book version coming out in February. Perhaps I will purchase that instead when it is available.