A bloke is driving 90 miles per hour late one night in his convertible with his amorous girlfriend when she reaches over from the passenger seat, unzips, and starts to give him head.
He gets so excited, he loses control of the car, which flips 12 times and crashes.
A policeman walks up to the guy, who is still buckled in and alive, and says, "Your girlfriend was thrown from the car and killed. You sure are lucky."
"Lucky? Go look in her mouth!"