Dirty Boy

One day a little boy and his dad were walking down the street where 2 dogs were having sex and the little boy asked the dad what they were doin and the dad said they were baking cakes. The next day the little boy and his mom were at the zoo where 2 monkeys were having sex and the little boy asked his mom what they were doing and the mom said they were baking cakes. Later that night the parents were having sex on the couch. The next morning the little boy said "you guys were baking cakes last night" and the parent said "how did you know that" and the little boy said "because i licked the frosting off the couch."