It's Locked!

Robert is quite ticklish, especially around his neck and belly.  James likes to tickle him in the car... I like to tickle his belly when he's lying down.  I often will ask him to "raise his shirt" and will then attack with some form of tickling torture.  The other night, I asked Robert to raise his shirt.  He shook his head, grabbed onto his shirt (holding it down firmly), and said, "It's locked, Mommy!"