I make pornographic balloon animals.
Sex freaks, sideshow attractions, and the mentally unstable.
Anything by Ronald McDonald.
A Thousand Clowns, Shakes the Clown, Killer Clowns from Outer Space, Death to Smoochy, Beat Me Silly Vol. 3
C-Span
Any of the Bob's Big Boy comics.
The greatest clown of all, George W. Bush. Oh, and Bozo after a five-day meth jag. Same thing, really.