Little Johnny attended a horse auction with his father. He watched as his father moved from horse to horse, running his hands up and down the horse's legs, rump, and chest.
After a few minutes, Johnny asked, "Dad, why are you doing that?"
His father replied, "Because I'm buying horses. I have to make sure that hey are healthy and in good shape before I buy."
Johnny looked worried, "Then I think we'd better hurry home right away."
"Why?" said his father.
"Because the milk man stopped by yesterday, and I think he wants to buy Mom."