Cujo

A guy applied to join a nudist club. "Exactly what do you do here?" he asked. "It's quite simple," said the club secretary, "We take off all our clothes and commune with nature." "Cool," said the guy, "...count me in!!!" So he paid his membership fee, took off his gear and strolled off.

As he walked along a path, he saw a big sign which read, "Beware of Gays." A little further along he saw another sign which read the same thing "Beware of Gays." He continued walking until he came to a small clearing which had a bronze plaque set in the ground. He bent over to read the plaque and it said, "Sorry... You've had two warnings!"