(Note: I had only had Jon reverse one of the changes with his finger, but let's assume he made the changes again so he could reverse them all.)
Class let out. As Jon was gathering up some of his papers, football captain Steve Zimmer walked by. Then he did a double take and turned around.
"Jon!" he said. "You're... you're..."
"Excuse me?" said Jon.
He was staring at Jon's chest.
"What are you looking at? I don't have breasts."
"I can see. What happened? You look like a guy now!"
"Wait a minute," said Jon, "I look like a guy?"
"Well, you always did a little bit," said Steve. "But you had breasts and you wore regular girl's clothes, and you certainly didn't have a bulge in your pants...."
"So you're telling me I'm a girl?"
"You used to be a girl, babe. What happened to you? Did you fall into a vat of chemical waste or something? Naaah, that isn't even possible...."
Then Jon realized. The way he had set it up, if he made a change with his index finger, nobody would notice the change. Not just Karyn. So not only did Karyn think that they were still swapped and that her breasts, vagina, and clothes belonged on Jon, so did everyone else.
Answering Steve, he said....