If Jon didn't have the stone, it would have been a problem. He didn't want to become a girl but it be better for him. He'd be forced to use the girls locker room and the girls would think he would a lesbian. The guys would look at him sexily which creeped him out more than being a girl.
"I wish I was girl with female hormones." Jon said as he transformed into Jen, complete with clothes and her backpack became a handbag with a purse in it.
So she went to locker room and changed like normal. There was one problem. She dropped the stone.
