I apparently am not.
Last night I was walking up the stairs while Sonny Boy was walking down them. We decided to play chicken, and after a minute or so of dodging each other to get by and laughing, I said, "You may be taller than I am now, but I still weigh more!"
He responded, "Mom, that's nothing to brag about."
I let him by and popped him on the behind as he went down the stairs.