He can only piss into the back of Cookie Monster's head.

Our diapers (the kids' not mine and Tom's, because we don't wear diapers not because we have different ones) have Sesame Street characters on them.  The kids don't even really watch Sesame Street unless I forget to change the channel after Cat in The Hat, but they pee on them.  Anyway, last week (I suspect just to fuck with me) Tommy decided to only ever wear Cookie Monster diapers.  Which is like 1/4 of the diapers because he's completely taking Elmo, Big Bird, and Ernie out of the rotation!  Well, he says he'd be willing to wear Grover diapers, but since Pampers doesn't make Grover diapers I think this is a false promise.  So now Danny gets all of the "off" diapers, and Tommy gets all the Cookie Monster diapers, and then when we run out of Cookie Monster diapers I have to force him into an Elmo one against his will and explain that if he'd use the potty he'd never have to wear Elmo again.
If anyone ever comes up with a sleep-away camp that potty trains your kid for you, they'd make millions.  Seriously. I'd be willing to ship my kid all the way to, say, Philadelphia for that. Business class, too.  Not coach.