Does anyone know of any good Physics jokes/comics that would be good for a physics group's tshirts and care to share? It's ok if they have a sexual innuendo, but these are for an University organization, so if it has a dirty overtone, it has to be subtle/decent. (To give you some sense of what is deemed alright, one of the Chem shirts that got approved was a picture of the periodic table below which said "Chemists do it on the table. Periodically" ). We can't use Xkcd comics or any other copyright protected comics/images. Thanks guys and bring on the nerdy physics jokes!