After eating, Jon took a paper cup and poured in some milk and cornflakes. Then he went to the bathroom and locked the door behind him. Sitting down and removing his pants, he stuck his penis into the paper cup and let Karyn eat. It felt extremely strange, like peeing except backwards, not to mention that he had to have his pants down and his legs wide open; couple that with the fact that it seemed that Karyn didn't have any muscle control in this state, and it made for an extremely awkward situation for the both of them.
So while Karyn ate, Jon tried to think; it was unfortunate that his thoughts kept de-railing every time he reminded himself that there was no way to un-wish his mistake. His wish had simply been too explicit, and now, no matter what, Karyn would be forever stuck with being Jon's penis...
"Ugh, okay Jon, I'm done. God, it's all in my hair..."
Jon looked down at his penis, which just happened to be a very pretty young girl with very healthy breasts and was apparently cold as well, since her nipples seemed to be quite erect... and realized that he needed to pee.
Without thinking about it too much, Jon quickly stood up to face the toilet and grabbed onto Karyn; and then stopped.
"Jon? ... Wait, you aren't thinking..."
"Ugh... I'm sorry, I really gotta pee!" Jon could only hope that no one heard him talking to his penis.
"Wait! I, oh crap..." Karyn cringed as she realized that there was no stopping it; Mother Nature called and at the moment she was a penis... "Oh man, this can't be happen-bbrg..."
Jon cringed as the full force of his urine hit Karyn; he cringed in part because he could practically taste what she was going through, and in part because with her like this he had next to no control over the flow and managed to pee on the floor for a bit before he'd managed to turn Karyn so that she would be spitting into the bowl...