One night a little boy walked in on his parents having sex and asked "Daddy what are you doing to mommy?"
The father then replied "Son I'm putting a little baby brother inside mommy."
The next day the father came home from work and found the little boy sitting on the front porch crying. The father sat down beside his son and ask what was wrong.
The little boy said "Well daddy you know last night when you put a little baby brother in mommy, the milkman came along this morning and ate him."