Weird...

So Monster Boo has started doing this weird thing lately and I don't know if he is just being funny or he is really just that odd. So, there are dents in his wall right next to his bed and we asked him where they came from. His response to this was "I eat it." And tonight we are playing in his room, a nightly ritual, and he says "Momma I want to eat the wall." What am I going to do with this boy?? And WHERE does he get this from???