Subject: Why Daddy is Fat

Every night Johnny hears a thumping sound coming from
his parents room. Finally one morning he goes to his
mom and says, "Mommy, every night I hear you and daddy
making noises and when I look in your bedroom you're
bouncing up and down on him." His mom is taken by 
surprise and says, "Oh, well I'm bouncing on his
stomach because he's fat and that makes him thin
again." And the boy says, "Well, that won't work!"
His mom says, "Why? And the boy replies, "Because
the lady next door comes by after you leave each day
and blows him back up!"