One day, a mother and daughter were walking in the Brooklyn zoo. They saw two monkeys doing it. The daughter turned and asked, "what are they doing?"
The mother was stuck, so she said, "They're making a cake."
The next day, they see two dogs doing a similar activity. The daughter asks the same question, and gets the same response. So, the next morning, the daughter said " You and daddy made a cake last night." the mother was shocked. "How do you know?!"
"Because I licked the icing off the couch"