You feel the need to examine the suit carefully for some reason. It is both too long and too thin. You stand at about 6 feet (183 cm) and weigh in at 200 pounds (91 kg) all of which is muscle and the suit seems designed for someone a foot (30.48 cm) larger and half your weight, or at least muscle mass. The last time you were that weight was five years ago, when you were sixteen, before you started bulking up. Still...
You try the suit on, slowly. It seems to give easily, though it fits tightly against your skin. The inside is mildly wet, which makes putting it on even easier. The zipper is on the front, though you don't try to zip it yet. Once you have it all on, you see that the extra height has translated into extra width - just barely enough to keep the suit from ripping as your musles strain against it. You notice your groin area getting a noticeable buldge. Finally you zip up the suit, marveling that you can even do so without breaking it.
As you finish, you look in the mirror. It's not actually a bad suit for how tight it is. Your hard member is clearly visible and it's a major effort not to just rub it through the suit. As you keep looking, the image in the mirror seems to change slightly and you feel the tightness of the suit lessen, as if either it's getting bigger to match your muscles or your muscles are shrinking to fit it. It's hard to tell which because you feel momentarily light-headed.
You look at yourself again. you're definately taller and less muscular than before. Your dark brown hair seems to have grown longer and the edges of it have turned blond.
"Dude, what's happening?" you ask aloud. Your voice sounds vaguely nasal as if you are starting to catch a cold. Just then you hear a knock on the door...