"When my penis gets bigger, then I will poop and pee in the potty."

said my youngest DS (turned 2 in May) this evening.  He was supposed to be sleeping, and he heard me passing by his door and thought he'd start up a friendly conversation about the size of his penis and how it affects when he uses the potty.  He told me that when his penis gets big, he will pull his pants and undies down by himself, and that he will use the potty all by himself.  And also that he will have a "really really big and huge penis."  

WTF?  Where does he get this stuff?