A Cat's Tail

Two men are in a bar are boasting about their prowess and one of them says:

- My cock is longer than that cat's tail.

A bet is made, the bartender supplies a ruler, and the cat is roused and measured.

But when the bartender begins the second measurement, the stud says:

- Just a moment! Where did you measure that cat's tail from?

- From the asshole. - says the bartender.

- Well, kindly do me the same favor.