Adventures with Cowboy George (courtesy of smirkingchimp.com)

Cowboy George, a Mexican and an Iraqi are in a bar one night having a beer. The Mexican drinks his beer and suddenly throws his glass in the air, pulls out a gun and shoots the glass to pieces. He says "In Mexico our glasses are so cheap we don't need to drink from the same one twice"

The Iraqi (obviously impressed by this) drinks his beer, throws his glass into the air, pulls out his gun and shoots the glass to pieces. He says "In Iraq we have so much sand to make the glasses that we don't need to drink out of the same glass twice either.

Cowboy George, cool as a cucumber, picks up his beer and drinks it, throws his glass into the air, pulls out his gun and shoots the Mexican and the Iraqi and catches his glass. He says "In America we have so many Mexicans and Iraqis that we don't need to drink with the same ones twice.