Tanker mate was trialing a formation of FJs. Half way through the long trip, trying to be amusing, the Tanker captain requests visual inspection. Tornado mate comes alongside, happy to oblige, and sees centerfold of a porn mag held up to the windscreen, tanker mate says:-
"can you see a crack in the windscreen?"
quick as a flash the Tornado mate replies:-
"no but I can see a C*NT in the cockpit"