The cattle auctions
A farmer takes his wife to the cattle auctions. They start by walking down the aisle with the bulls. They come to the first bull and a sign on his pen states: "This bull mated 50 times last year."
The wife turns to her husband and says, "He mated 50 times in a year, you could learn from him."
They proceed to the next bull and his sign states: "This bull mated 65 times last year."
The wife turns to her husband and says, "This one mated 65 times last year. That's over 5 times a month. You could learn from this one as well."
They arrive at the last bull and his sign states: "This bull mated 365 times last year."
The wife's mouth drops open and she says, "Wow! he mated 365 times last year. That's ONCE A DAY!!! You could really learn from this one."
The farmer turns to his wife and says, "Go up and inquire if it was 365 times with the same cow."