[Ed: This joke was placed in rot13 by the original poster.]

Boot camp. Duluth, Minnesota. February. Six A.M. Six below zero.

The Sergeant bellows, Outta those bunks! Birthday suit inspection! I want you
(deleted) to fall in outside, NOW! Buck nekkid! Stand close enough to make the
man in front of you smile! MOVE, YOU #@$$&*s!

The barracks quickly empty, the men fall in and shiver at attention.

The Sergeant hollers, LOOSEN RANKS!

The ranks separate a bit. The Captain approaches, carrying a swagger stick.
With the stick, he swats one of the men across the chest.

Did that hurt, Mister? the Captain demands.

No, SIR! the recruit shouts.

Why not? barks the Captain.

Because Im a U.S. Marine, SIR!

The Captain nods, and moves on down the front rank a bit. He whacks another man
across the butt.

Did that hurt, Mister?

No, SIR!

Why not?

Because Im a U.S. Marine, SIR!

Satisfied, the Captain continues on down the rank. He notices that one of the
men is sporting a huge erection, and brings his stick down sharply on the
proffered target.

Did that hurt, Mister?

No, SIR!

Why not?

Because it belongs to the fellow behind me, SIR!