Jon got the stone from his pants, still thinking about the safety catches. He would have to wish that when his fantasy was fulfilled, he would return to his own, original self, the way he was here and now, with the stone still in his possession. That would probably solve most problems. He'd just have to set a time limit, or some other way of fullfilment, to his wish.
As he considered his phrasing, he started hearing music coming through the bathroom door. Goth music. Loud Goth music. Zoe's loud Goth music. Jon sighed. By now he'd learned to tune that kind of thing out. Jon closed his eyes and focused.
"I wish," he said, his hands trembling, "that when the conditions of the following wish, which will for a while change my life, I will return to my own body, the body of Jon Gibson, with this wishing stone still in my possession."
His cock was now rock hard in anticipation to what he was about to do. "I wish... I wish... that every girl in my school was..."
In the middle of the ni-i-ight
I go walking in my sleep
"Billy Joel?" Jon almost dropped the stone in his confusion. Why would Zoe be listening to Billy Joel? That didn't match her tastes at all.
But then Jon realized what words had come out of his mouth, and he really did drop the stone. "I wish that every girl in my school was Billy Joel."
Shit.