With a small smirk still on your face, you take the dress over to the changing rooms, passing the women you'd followed in here on the way. You considered swapping with them for a moment, but for the time being, you were more interested in your own body right now instead of swapping it away again. Perhaps if they were still here after you'd gotten a better look at yourself. So, instead, you simply enter the changing room, and lock the door behind you. You were alone, free to inspect as you wish.
Before anything else, you take a look in the mirror. It's an odd sight, seeing your teenage, male head atop the body of what was clearly an older, female body. You'd already seen it in the screen that appeared when you were swapping, but seeing it in motion like this really drove it home. From the neck down, you were a woman now, even if the rest of the world didn't see it that way. Hanging up the dress and putting down your bag for a moment, you get a bit closer to the mirror and give yourself a bit of a turnaround. Admittedly, you could already spot some areas you were considering improving by swapping. As you'd previously noted, your new stomach did seem to be a little chubby. Not to the point that you'd call yourself fat or anything, but you imagine yourself wanting to swap it out for a flatter stomach at some point. Your breasts were also a bit on the small side. They seemed bigger when you were just looking down, presumably because you weren't used to that kind of perspective, but compared to the women you'd followed, they did seem a little small. Thankfully, what you lacked up top, you made up for down below, as your new body seemed to be a bit pear shaped, befitting of the "mum body" description you'd given it earlier. Whether this body had actually had kids or not, you had no idea, but it certainly had the hips for it, and a rear to match, much to your delight. That was one pert you definitely didn't need to improve. For a moment, you find it odd that you're thinking about improving your new body, instead of just swapping it out for a new one, but part of you doesn't want to let your new body go just yet. You knew it wasn't really yours, but something about it felt special. Perhaps it was just because this was your first time swapping, and you'd be more comfortable swapping and changing everything whenever you wanted after you'd been through this a few times.
For now though, you decide to do what you came in here for, and a little nervously, you begin to strip. Turning away from the mirror and trying not to look just yet, you slip off your shoes and pants, before pulling your shirt over your head and turning back towards the mirror. "...Whoa," you mumble to yourself. Somehow, seeing your new body stripped down to your underwear made this feel all the more real. Admittedly, without clothes obscuring your body, revealing for all to see that this was without a doubt a woman's body, made your head look even more out of place, but you weren't exactly looking at your head at the moment. One of your hands makes it way to your hips, gently rubbing there, as if to try and convince your brain that these wide, womanly hips were really yours. The other hand does the same to your belly, feeling the soft, feminine flesh that was so foreign to you. Despite the fact that you were still in the store, even if you were inside one of the changing rooms, your hand slowly drifts upwards, cupping one of your breasts, still contained within the bra the woman had been wearing when you swapped with her, before giving it a gentle squeeze. You involuntarily cross your legs as you let out a small squeak, not prepared for how that would feel. It starts to cross your mind that maybe a clothing store changing room wasn't the best place to do this. Despite that, though, as one hand falls away, the other starts to trail behind you, moving from your hips to your butt as you look at the mirror over your shoulder. "It's so soft," you mumble, quite pleased with your new rear. You give it a small smack, your face going a little red both from the feeling of it, and from the fact that it had been a little louder than expected. You could only hope that no one outside the changing room had heard you.
Having decided that that was more than enough exploration for a public changing room, you decide to go ahead and do what you came here to do. Grabbing the dress off the hanger, you somehow instinctively know exactly how to put it on, despite having never worn a dress in your life. You supposed that thanks to the swap, you'd likely been wearing dresses far more often in this reality, so even if you didn't consciously remember, your muscle memory was still there. If only takes you a few moments to get dressed, and before you know it, you're back in front of the mirror, admiring your handiwork. If this was the kind of clothing you'd inherited from the woman, then you couldn't say you disliked your new sense of style. Admittedly, it seemed to be more so chosen to hide the parts she was self-conscious about rather than show off the parts you liked, but it did still look good on you. It seemed like the kind of thing someone who was supposed to have this kind of body would wear. Of course, you weren't exactly someone who was supposed to look like this. You were a teenage boy with a mature woman's body. If you actually put the time in to actually look at what you were picking out, instead of letting your body go on auto pilot, you could probably find something more to your actual tastes. Of course, if this was the kind of stuff you normally wore in this reality, people might find a sudden change in style odd.
As you turn back to get your clothes, you spot your handbag, not even noticing that you were already thinking of it as yours when it had belonged to the woman mere minutes earlier. The remote that had given you this body was still inside. Glancing down at your body again, you start to ponder whether you should go ahead and start improving your body already. Putting your ear to the door, you hear a few of the women outside. If you really wanted, you could "borrow" some parts of theirs to improve your body, or perhaps even change your head to be a better fit for your body. And with your place in the changing room, you could immediately inspect any changes you make immediately... though from in here you wouldn't be able to see if the person you swapped with left. Part of you thinks that might be a good thing. You'd already lost your body to a random woman, but you still weren't completely used to the idea of swapping something while knowing you wouldn't be able to get it back. Perhaps it would be good for you to try swapping with people you knew would be out of sight by the time you'd gotten to grips with your swap.