Jon was engulfed in a flash of light and then there was complete darkness.
He looked around, hoping his eyes would adjust, but everything was still cast in complete darkness. He assumed that everything was so dark because he was inside the birthday cake. And he would be correct.
He ran his hands all over his body, and was pleased to discover that he had very large breasts. But something puzzled him. He still clearly had a male body, which was especially obvious between his legs. Maybe he wasn't clear enough in his wish that he wanted to be a female stripper, and not a male one with breasts?
He searched around for the wishing stone, but he couldn't feel it anywhere. It was gone!
Then, though it was muffled, he could clearly hear singing coming from outside the cake he was in. A group of people were singing "Happy Birthday". Jon knew that it would only be a matter of seconds before he would have to jump out of the cake. But what kind of crowd would be interested in a male stripper with breasts?