Teething, anyone?

Here's how you know your son is teething.
You stop and grab a box of butter at the grocery store and hand it to him, and before you can make it down the canned food aisle, he's already bitten through the box and a stick of butter and his face is covered in butter.
(giggle)
Try to explain that to the concerned cashier when he mentions, "Um, did you know this butter is damaged?"
I promise, I couldn't make these things up if I tried.