Jon realized that he had to get home and change his pants. No, that wasn't right. He needed to go to his locker and get out his spare gym shorts. Usually he would wear them over his underwear, but if instead he put them on without underwear, just for a second, his wish should should affect the....
Wait a minute.
He was still a bit under the influence of the spell to not pay too much attention to the panties, so he dismissed the possible reasons why he had panties on. But ignoring the weirdness of just having them at all, Karyn remembered that he always had panties.
That meant that reality was changed as if he always had panties.
Reality included a lot of things. People, relationships... And it also included, for instance, the clothes he already owned.
In other words, if he puts on panties, his body changes, and Karyn's memory changes, and all the related clothes he owns change too. That meant that he didn't have any clothes to use to change back! He was stuck like this until he either bought or wished up some male underwear, or borrowed something (and that risked giving himself a copy of someone else's penis).
Or maybe he was wrong. So at the end of the next period, he passed by his locker and opened it... and stared inside. It was hard to tell with his gym shorts all folded up, but he took them out and looked at them and he could swear that they looked more like a pair of girl's gym shorts....
