A little girl is sitting with her mom and she sees two people having sex on the tv.
The girl ask what they are doing..and the mom says they are making a cake..
So the little girl walks down to her parents room one night and goes into it and ask if they'd just made a cake.
The mom says yes honey, we did, how did you know?
The little girl replied, "cuz i just licked the icing off the couch."