The more you think about it, the more changing yourself starts to sound appealing. You'd always been kind of curious what being a girl was like, and this might be a time to find out in a controlled environment. Besides, seeing all these boyish girls walking around really was turning you on and part of you now wants to experience the change for yourself.
You make your way to a clothing store and slip into a changing room with a floor-length mirror, which seems an appropriate place to try things out. You shut the door behind you then turn to face your reflection and hold up the flashlight. The first thing you decide to do is the purely physical change; you set the light to organic and a moderate pink, and then shine it up and down yourself from head to toe.
You can feel the changes begin even as you watch them happen in the mirror. You lose a few inches in height and your sandy brown hair grows out slightly, still shorter than a lot of girls would wear it but tickling the back of your neck. Your face becomes smoother and rounder, with softer, more feminine features - you're not a remarkable beauty, but still, you decide that you're kind of... cute? Lower down, you can feel your hips broaden and round while your waist slims down, and then your nipples expand under your shirt, swelling into a pair of firm b-cup breasts. Your crotch tingles with arousal at the sight and you can feel your dick harden, at least for a moment - there's a strange feeling as your groin inverts, your dick and balls pulling inside and leaving a vagina behind; you're still aroused, but now it's a different feeling, a warm and wet one. With your physical changes done, your clothes follow a moment later, remaining largely the same but shifting slightly to a women's cut - still a pair of jeans and a t-shirt rather than anything too girly, though. The biggest to you clothes is one you can't see, as your underwear changes to a pair of panties and a bra forms around your breasts.
Looking in the mirror, you see a cute, rather boyish girl staring back - obviously female, but not terribly feminine. Time for the next step. You switch the flashlight to the "mi" setting and adjust the pink light to a low setting - you were a dude when you started out, so making your mind slightly more feminine ought to shift you more towards what a tomboyish girl would be like. You don't notice any immediate changes when you shine the light on yourself, but then you realize that you now feel much more comfortable in your new skin than you had a moment ago, and your memories have subtly changed as well. You still remember being yourself, but you have new thoughts as well, memories of being playing sports at school, of going camping and playing video games, getting into more than a few fights because there was no way you were going to let the boys think you weren't as good as them just because you were a girl... you shake your head, clearing it. Well, that seemed to have worked, anyway. The world now knew you as a girl who was into a lot of "guy things", and that seemed right as a way to think about yourself, too. You knew you'd been a guy yourself until just a few minutes ago, but oddly, you couldn't think at the moment of a compelling reason to ever change back.
One more step. You switch the flashlight to the "sp" setting and consider it for a moment. You've always been into girls, but maybe giving yourself a bit of a kick wouldn't be so bad. You turn the pink light up and flash it on yourself; no noticeable changes here, but then, you are by yourself. Now for the final touch. You switch the light to blue and shine it on yourself as well. Suddenly thinking about men is much more interesting than it was a moment ago; you can't help but smile to yourself as you imagine a certain male celebrity shirtless, running a hand through his hair, giving you that rakish grin - not that women didn't still excite you as well. You were now bisexual with a more-than-healthy libido.
Well, now your changes were over. Time to take a walk on the other side.