One day a little boy and his mother were walking through the park.

The little boy sees a couple having sex on a park bench and asks his mom what they are doing.

The mother was so shocked that she blurted out, "Nothing son, they're just making a cake..."

Later on that afternoon, she took her son to the zoo.

As they approached the monkey cage, the little boy looks up to see two monkeys going at it and again asks his mother what they're doing.

She replies, "Nothing son, they're just making a cake..."

The next morning, the mother was making breakfast.

When her son woke up, he came into the kitchen, looked at his mother, and said, "Mommy, you and daddy made a cake on the couch last night."

The mother was shocked and asked the son how did he know... he simply replied,

"Because I ate the icing off of the cushion!"