Once his wish was completed he perceived a flash. It wasn't truly a visible flash, or even truly something he felt, or heard, but more like a soft encompassing of his entire being by a background of various forms of white noise.
When it was over.... well, he felt different.
'Did it work?' Jon tried to move... but he couldn't. He tried to look around, but all he saw was a vaguely-lit reddened haze.
But he could hear.
The first thing he managed to hear was the sound of a car horn going off and some people talking. He didn't know what they were saying, and they weren't close enough, nor reciprocated by the person he was attached to, so he didn't know nor care what was being said, since it didn't help him figure... himself out.
There was a lot of shuffling and movement, and that reddish film in front of his face shifted just barely, though it afforded no new view on his situation. He then heard some knocking on a door... then nothing. There was some further, far off noise, and the sound of a car door opening and closing, and then the car driving off, and then more knocking.
This time the door didn't take long to open, "Oh, hello Karyn. Can I help you with something?"
Jon's attention was locked on the conversation, "Yeah, sorry, I think I left something here, do you mind if I come up to get it?"
"Oh yes, of course, go right ahead."
"Thanks." And with this, Jon's world was moving again. With effort he could make out legs moving past the other side of the cloth film over his face, but he couldn't make out much detail.
'So I'm Karyn's vagina. Great, that's pretty cool. I wonder what it's gonna be like to be her vagina for the next month? I wonder what happened to my body, though. And what did Karyn leave here? I guess I'll find out.'