Deciding to wish his cock back to normal briefly, Ty's mind flicked through the endless possibilities, but his hands quickly got bored of idly considering his options, leading them to start playing with his still hard rod, while his mind drifted to beautiful women. For some reason, he seemed to have a thing for black women; they just looked sort of warm and soft, and seemed to stand out from the rest in his fantasies.
That was it! Ty's brain realized what he wanted to try. He could become a black woman of the kind he idealized with his powers! His penis twitched, maybe with pride, maybe with the twinging fear that it was about to be exhumed from his body. But that wasn't something his lust-addled mind cared about right now; pleasure was pleasure, after all.
He looked over his somewhat scrawny teenage body and said to himself, "I wish my body would transform into that of an 18-year-old black woman." As he finished, he sighed in pleasure as the wish started to take effect. His skin and nails seemed to soften, and he felt shivers run across his body as all of his body hair receded into his body, leaving soft, smooth feminine skin.
He then noticed the twinges of darker skin pooling at his feet, and watched as the skin tones spread like water across his body, flowing up until they washed his face in beautiful melanin shades, subtly affecting his other features such as his lips and nipples as they passed over all of him. As it reached his hair, it twisted itself into soft braids which flowed calmly from his head.
It was at this point that Ty's femininity began to release itself, to the pleasure of his hormonal lust, enriched by the new feelings. His dark nipples opened themselves to the tenderness of the cool air and became erect, greedily drawing flesh to the points beneath them to feed them and allow them to swell from erect pinpricks on Ty's chest to sensitive, full mammaries. Ty brought his softening hands to them and squeezed, his moans softening as the hormones allowed the maleness of her voice to fade away. Her mind was adjusting to her femininity; she was no longer a boy, she was a girl now, and she was subconsciously incorporating her female knowledge.
The intensifying pleasure was too much for her hard penis, which was looking increasingly out of place as her hips and thighs rounded and pinching contractions inside him waited to consume her maleness. With a series of sharp pants, she squirted haphazardly onto her stomach, and after a few seconds felt her testicles retract inside her, sliding into place as part of her womanhood. This led to the inevitable fall of her penis, which she watched with aroused fascination as it shrank and shrivelled up, until it was subsumed into her body, the head shifting up and receding into a tiny nub which quickly covered itself in a clitoral hood.
As the changes finished, Ty looked at herself excitedly, and only five words escaped her mouth: "Oh my God... I'm beautiful!"