I started strip in the locker room of my favourite pool, when someone turned into the row of the lockers and approached towards me. I looked up and made a small gasp.
In front of me stood Liam Campbell, a famous Australian swimming star and Olympic swimmer.
"Hello, young man. Time for some exercise?" He asked with a friendly smile.
I was shocked still for some seconds and just looked at him in awe.
"Um... yeah, Mr. Campbell... it's my favourite time and place..." I answered.
"Call me Liam, you're no seems to be kid anymore. I'm first time here, I heard about this place and wanted to check it on. May I ask, onto what competition do you train?" He continues his friendly chatting, while he removed his hoodie. I couldn't help but stare at him again for seconds with open mouth.
He had well-trained, muscular, but wiry body and massive bulge in front of his speedo.
"Well... Mr. Cam... Liam... I'm not doing competitions anymore, since five years ago. My best place was a 6th at the elementary school's competition at age 8, but then I had long-lasting illness and I had to quit from the team. Since then, I'm just swimming from fun." I answered while I reached into my bag to get my shorts.
"Sorry to hear that, young man..."
"Um... thanks... oh man, it seems I forget to pack my swimwear. It never happened with me."
I fell dissapointed to the bench. He looked at me with thoughtfully.
"I think, I can help you... well, more than one way... here, try this!" He said, reaching into his sports bag and pulled out a speedo and offered to me.
Although I never wore a speedo before and even preferred my swimming shorts instead of swim briefs I didn't want to be rude and didn't even had too much choice and accepted it.
The speedo has deep green and gold colors, the speedo logo on the front right and the Olympic logo on the left. The same, he wore himself.
I ran my hand along it to feel the spandex material before I put it on. The smooth material feels amazing, I think to myself that it'll at least be comfortable.
"Could you please..." I asked him shyly to look away.
"Oh... of course!" He said and we turned our back to each other.
I pulled down my boxers at last and put it into the locker, as the rest of my clothes. Then I stepped into the speedo and slid it up, shivering with pleasure when the soft material hugged my member, but it was a bit loose and baggy, due to my rather scrawny body.
I felt a weird sensation for an instant, almost like I had pins and needles in my whole body. However, the feeling remains in my feet, and I gasp when I see my average-sized feet stretch and widen, perfect for propelling myself through the water. The tingling feeling then moves up my body to my legs.
My calves grow out to become lean and muscular, while my now solid thighs expand massively until they start stretching the speedo.
"Ugh... what's happening with me?" I looked at my upper arms, which began inflate as well.
He turned back.
"Your body will be true swimmer's now, that's all." He said with a simple tone.
"What kind of joke this... is... ugh..."
I start moaning as the front of speedo starts expanding, as my member became erect. It is clearly visible through the speedo, which starts to fit now. I can't help but place it straight and upwards, then start to caress its underside through the swimsuit, the silky material making the experience even more pleasurable.
"Yes, don't be ashamed and let it out..." He says with a slightly greedier tone.
I stroke faster and faster my spandex-encased penis.
At the same time, a perfect bubble butt pushes out the back, stretching the speedo even more. Eventually I came, filling with cum the speedo. Starting from my groin, my skin took up a golden tan color, just like Liam's.
My previously non-existent pecs bulge out and flatten into rock hard armour-like slabs of muscle, making my expanded nipples stand to attention. The tingling spreads up my neck and my shoulders, which crack and widen before swelling with my taut back muscles, toned from years of swimming backstroke.
I stare my new, australian, athletic teenager body with awe, realizing that my speedo now fits perfectly, if a little tight, thanks to my muscular bubble butt and noticeable bulge in front. But no doubt, it is much more comfortable, than swim shorts. Simple feels good to wear it.
As I was admiring myself, strange thoughts filled my mind; winning much of the swimming competitions and becoming an olympic swimmer alongside Liam, who is my childhood best friend.
"How do you feel, mate?" He asked.
"I... never felt better, mate!" I said and grinned at him.
"You're gonna need this as well..." He says and offers me a swimming cap and goggles, both the same as his own, of course.
"Then no more wasting time! Into the pool!" He says.
A last check to your locker, noticing that instead of your clothes now there is a very familiar uniform, consisting a green and gold spandex sweatpants and a matching hooded sweatshirt with a name of Matthew O'Callaghan on it. I smile wide and closed the locker, then pulled on the tight swim cap and adjusted the goggles on my forehead.
We give each other a high five and headed towards the pool.