A man takes his wife to the stock show. They start heading down the
alley that has the bulls. They come up to the first bull and his sign
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 is over 5 times a month. You can learn
from this one, also!"

They proceed to the last bull and his sign says: "This bull mated 365
times last year." The wife's mouth drops open and she says, "WOW! He
mated 365 times last year. That is ONCE A DAY!!! You could really learn
from this one!"

The man turns to his wife and says, "Go up and inquire if it was 365
times with the same cow."