An oldie but still a goodie.
Two bulls are standing on a hill. Off in the distance, they see a group of cows.
The young bull excitedly nudges the old bull and says, "Hey! Hey! I know! Let's run over there and **** one of those cows!"
The old bull looks at the young bull, then turns and takes a long look at the cows. He turns back to the young bull and says, "Son, let's walk over there and **** 'em all."