A man has a racehorse, never won a race.
Man in disgust says, “Horse, you win today or you pull a milk wagon tomorrow morning. “
The starting gate opens, the horses take-off, they move the gate away and there lays his horse asleep on the track.
He kicks the horse and asks, “Why are you sleeping?”
The horse, half asleep, says, “I have to get up at three in the morning. “
This joke is included in the Black Book of Jokes. You can order it from here.