You decide to take things slow and start with the only place that truly counts, the crotch. The other upside, you think, is that you won't immediately need a whole new wardrobe. Sitting on the toilet in the women's restroom you carefully shine the magic pink flashlight onto your crotch and nowhere else. You watch with interest as your scrotum and testicles shrink right out of existence. You feel weird tingles as a vagina takes its place in between your still hairy legs. You turn the flashlight off and rub the outside lips of it, which are surprisingly smooth and feel recently waxed.
You immediately put the new vagina to use in clearing your bladder, examining the new sensations of it. You clean up and debate the next step...