A little boy wakes up on his 9th birthday...

..and runs into the kitchen where his dad is making breakfast. The boy asks his dad to guess how old he is, and his dad plays along.

"Umm, 30 years old?"

"No," laughs the boy, "I'm 9!"

"Awesome!" His dad says, "You're a young man now! Go in the living room and see if your uncle can guess how old you are while I finish breakfast."

So the boy goes in the living room where his uncle is sitting in a recliner drinking a beer.

"Uncle, uncle!" giggles the boy, "Guess how old I am!"

His uncle slowly gets up, walks over to the boy and shoves his hand down the back of the boy's pajamas. The boy's eyes go wide in surprise as his uncle squeezes his buttcheeks and fondles around. Then the uncle pulls his hand back out, brings it to his nose, and takes a long sniff.

He looks down at his shocked nephew and says "You're 9."

The boy asks "You can guess my age just from feeling around on and smelling my butt?"

"No," his uncle says, "I heard you tell your dad in the kitchen.."