After looking through the vast array of speedos, you eventually decide on the Team Australia speedo, despite only large sizes being available, because of your affection for the country. The speedo has a green and gold pattern, and has the word 'AUSTRALIA' printed on the back, as well as the speedo logo and Australian Olympic logo on the front. You take it off the hanger to try it on, but are stopped by the shop assistant on your way to the changing rooms. "Ah, excellent choice! You'll want me to get the matching cap and goggles for you, I'll be just a few minutes." You try to tell him that you don't them, but he's already gone into the storeroom. Ignoring this, you head into the stall and strip off to put the speedo on. You look at your slim figure in the mirror, you know that it won't fit well but you hope that it'll at least make you look a bit better when you go swimming. You decide run your hand along it to feel the spandex material before you put it on. The smooth material feels amazing, you think to yourself that it'll at least be comfortable. You slide the speedo up your legs, showing that it is a bit too baggy, as expected. You pose in the mirror for a couple of minutes to see how it looks on you, when you notice something odd about your hands. They feel smoother and softer than usual, and they sort of look bigger somehow. Puzzled, you ignore the slight ache in your back and legs, until you realise that your body is being stretched upwards. You check yourself using the ruler on the mirror - 6'3! Panicking, you shout in surprise, but your shout sounds odd somehow. Your accent sounds... different. Almost... Australian. Becoming vaguely aware of what's happening, you stare into the mirror to see what happens to you next. You notice the veins in your arms pumping slightly heavier and faster, and your forearms swelling with lean muscle. The swelling spreads up to your biceps, which expand and bulge out until they become pretty impressive for any swimmer. Your shoulders then crack as they widen and gain some muscle to accommodate your new larger arms, sculpting your back in the process. Your feet start growing as well, cracking and shifting longer to an impressive size 12. Your calves grow out to become lean and muscular, while your now solid thighs expand massively until they start stretching your speedo. You start moaning as the bulge in your speedo starts expanding, your cock lengthens out to about 8 inches, and being just narrow enough that you can wrap you hand around it. Your dick is clearly visible through your now tightly-fitting speedo, tucked to the side. You rub your hand back and forth around your spandex-encased penis, the silky material making the experience even more pleasurable. When you eventually jizz, you moan a little too loud as the streams of cum fill your speedo. Your skin seems to absorb the semen, darkening the skin around your groin into a golden tan, earned from years of soaking up the Australian sunlight at the pool or beach. You involuntary rub some cum into your butt-crack, prompting your ass to grow and round out into the perfect speedo-stretching bubble butt. As the golden tone spreads up your body, you wince as your abdomen pulls and pushes itself into a washboard set of six-pack abs, and your new meaty pecs swell out. Your face starts changing as well as the golden tan covers your whole body, your jaw becoming a handsome angular hexagonal shape and a light brown stubble forming around your chin and mouth. Your nose crunches into a masculine Greek shape as your eyes change to a bright blue and your eyebrows thicken and become a contrasting brown. Finally, your hair lightens from your dark brown to a light, almost-blonde brown, sweeping up out to the side, out of your face in a fluid motion. You stare at your new, beautiful body in the mirror, realising that your speedo now fits you perfectly, if a little tight around your massive cock. You run your hand down your chiselled, tanned chest in awe, unbelieving that you would ever have a body like this. You are broken out of your daze by a knock on the stall door, you open it to reveal the shop assistant holding a green and gold Team Australia swim cap and matching green and gold goggles. You take them and thank him, making him smile and close the door. You turn back round to the mirror and pull on the tight cap, making sure it covers your hair properly. You place the goggles over your eyes as well, just to see what they look like. As soon as you tighten them, your mind suddenly goes blank. All of you memories disappear, and you mind is completely empty. Suddenly, memories and thoughts come rushing back in, but they're new. Memories of growing up in Brisbane, and swimming every day, and swimming in local competitions, and the excitement of being accepted to swim for Australia in the Olympics... You shake your head, why are all these old memories coming to you? You're just shopping for a new speedo. You take off your cap and goggles, and put them in your drawstring Team Australia bag, courtesy of the Olympic team, of course. Where your clothes were, you notice there is now a green and yellow Team Australia uniform with your name, Liam Campbell, printed on the back of the hoody. You admire yourself in the mirror one more time. "Now that's a budgie smuggler if I ever seen one!" you laugh to yourself, stroking your less-than-subtle bulge. You put your hoody on but leave the trackies in your bag so everyone can see your new speedo. You put on your flip-flops - wait, thongs - and go to pay for your things. The shop assistant smiles, "That's free of charge, just for you, Liam." You grin, "Aw, that's amazing, thanks mate." You leave the shop with your purchases and hit the street, bulge fully on display.