The little girl says "Mommy what are they doing?"
The mother hesitates then quickly replies "Ummm... they are making cakes. now come on, we'll go to the Zoo"
At the Zoo, the little girl sees two monkeys having sex.
Again she asks her mother "What are they doing?"
And her mother replies with the same response, "They are making cakes. Thats it we're going home"
The next day the girl says to her mother "Mommy, you and Daddy were making cakes in the living room last night, weren't you?"
Shocked, the Mother says, "What? How do you know?"
(Wait for it............)
She says, "Because I licked the icing off the sofa."