A boy goes to his parents room to find his mom on top of his dad. The kid then asked "mommy, why are you on top of dad?". The mom responded by saying "well hunny, you see your dad has a big stomach and I have to make it go down.". The kid says "well, good luck with that, because everytime you leave to go to the store a lady come in and blows it right back up."

made it myself.