Just to clarify, Stan doesn't sit on the step for not wanting to eat - he doesn't have to eat - but he does have to taste what is on his plate before he says 'I don't like it it's yucky, I want baked beans.' Surprise surprise, he will then 95% of the time taste it, find he likes it, and finish off a good part of his meal.
If he says 'I not hungry', that's fine but as pp he doesn't get something else instead. Surprisingly, even when he's skipped dinner entirely, he's really never woken hungry in the night.