They don't care why things happen, they just seek rewards. Very animalistic - no philosophical framework.

Peeing in toilet = candy & parents look pleased
Pissing self = no candy & parents look pissed
Therefor, pee in toilet, don't piss self.

Without the candy incentive (doesn't care whether we approve or not), fuck taking time out of her busy schedule of telling a story about a horse who eats lots of hay and is blue and has friends with a thousand dollars and is a hippinpotmas - if she has to piss, she's doing it right there, right then. Maybe when she's ~four, things'll change. ... Or she's just outsmarting us. Unsure. Maybe the hardcore individualist streak is from us telling her, before going to church with grandparents, that Jesus comes down the chimney each Christmas to be burned alive so Catholics can eat his charred flesh and be pacified rather than killing us all. No, probably just bad luck -- some kids are just born weird, I guess.