A bright flash of light emanated from the rock, coupled with a strong gust of wind; the sort of effects that were to be expected when a major wish was being granted.
When it subsided, Jon and Karyn were once again standing in his bedroom; the burst hadn't trashed everything (as Jon might have expected), merely left it...different. Whereas seconds before, it had been the bedroom of a typical (if somewhat nerdy) teenage boy, it was now clearly much more akin to the bedroom of a typical (if somewhat nerdy) teenage girl.
Gone was the darkly-shaded wall-paper, having been replaced by a much brighter and somewhat more cheerful aquamarine paint job. The heavy curtains too had vanished, replaced by light, lace ones. A vanity stood in the place of Jon's dresser and his desk (which had been wooden) had been replaced by a pretty glass one.
What was even more odd was that the perspective now seemed to Jon to be off, as if he had suddenly become about a head shorter...
"My god, Jon! You're a girl!" Exclaimed Karyn just as the realization donned on him. They had both been so much in shock that it taken them a few seconds to notice, but it was undeniable.
Jon was now a girl. He (or rather she) now wore a pair of black leggings which came midway down her (clean shaven) calves before terminating in lacy cuffs. She wore a little blue dress over top, which accentuated her two C-cup breasts, and whose wide neckline revealed the thick, black straps of her bra. Her brown hair had grown midway down her back, and was now styled in a soft, feminine fashion. Her face (on which she now wore make-up), had had its features completely feminized; and she was now, indeed, a full head shorter, and much slighter.
To look at her, there was absolutely no way to tell that she had ever been anything other than a girl.
And a fairly attractive girl too, Karyn thought, before catching herself. Why was she thinking such things! She wasn't a lesbian!
Jon collapsed in astonishment upon her bed. Immodestly, she ran her hand up her dress, feeling her groin (which was smooth and feminine) and cupping the squishy mass of one of her breasts in her hand.
"I'm a girl," she uttered, taken aback by the pitch and resonance of her new voice. The weight of it collapsed down upon her; she was no longer one of the boys, but a girl through and through. Female. A lady. A woman. With a vagina and breasts and dresses and tampons and make-up and pregnancy and...
"But it doesn't make any sense!" Exclaimed Jon! How could I be a girl? I didn't wish to be a girl..."
"Umm, Jon," Karyn cut in. "I don't think you're the only one."
Karyn indicated to the posters on Jon's wall. Before the transformation, the wall had been covered in various posters for things that Jon happened to like. They were now covered in the same posters with one key difference. All of the people depicted on them, without exception, were now female. A poster for Nirvana depicted Kara Cobain; a poster for Star Trek: The Next Generation depicted Patricia Stewart, wisely leading her (entirely female) crew.
Jon ran off and quickly examined all of the books in her shelves. They remained much the same (although there were now "Chick lit" titles, in addition to Jon's old books), except the fact that many of the author's names had been changed. "A Tale of Two Cities" was now written by some woman named 'Charlotte Dickens;' "Her Dark Materials" was now written by Phillipa Pullman.
Both instinctively looked-out Jon's window. The suburb that surrounded them was slightly different from how it had been before; houses were painted in different colors, and made more use of curves. And Jon could see her neighbor Fred (or whatever she was calling herself these days), out mowing her lawn.
Only then did the full magnitude of what she had done occur to her; as a result of her wish, every single male human who had ever existed had been transformed instantaneously into a female.
"Welcome to paradise," said Karyn.
