A trucker drives his fully loaded rig to the top of a steep hill and starts down the other side when he notices a man and a woman making love in the center of the road. He blows his horn several times, but they don't budge. He slams on his brakes and stops just inches from them.
Getting out of the cab, madder than hell, the trucker walks to the couple, still in the road, and yells, "What the hell's the matter with you two? Didn't you hear me blowing the horn? You could've been killed!"
The man on the highway looks up and says, "Look, I was coming, she was coming, and you were coming. You were the only one with brakes."