It's Billy's 11th birthday. He bets his dad can't guess his birthday and dad gives up and says i don't know. Billy says, I'm 11 daddy.

He then goes downstairs and sees grandma sitting on the couch. He makes the same bet with grandma, about guessing his age. She sticks her hand down Billy's pants and fondles Billy's balls for about an hour. She then removes her hand and tells Billy that he's 11 years old.

Billy is amazed, and asks grandma how she knew. Grandma says......"I heard you tell your dad upstairs".