Dying Beaver

Little Johnny was taking a shower with his grandma.
He casually asked,Grandma whats that?" She quickly replied, "That's my beaver. Little Johnny didnt say another word.
Two days later he was taking a shower with his mom. Little Johnny asked,"Mommy whats that?" She replied, Well Johnny thats my beaver.

Little Johnny thought for a bit and said,"Well grandmas beaver must be dying her tongues hanging out!!