COWS HAVING SEX

A young boy comes into the kitchen and tells his mother that the brown cow fucked the white cow. His mom explains that this is not a nice word and from now on if he sees this he should say that the brown cow surprised the white cow.
The next day was the mother's bridge club and with all her lady friends present the boy runs into the house and says, "Mom, guess what?"
The mother says, "I know dear, the brown cow surprised the white cow."
The boy replies, "He sure did, he fucked the white cow again."