I stood there admiring my new sexy body. I was lean and large, must be about 175 or something. I flexed my pecs and admired their firmness. Then I stiffened up again. It was happening again! I looked in the mirror and saw myself growing. It wasn't a strong as last time but it seemed to be finishing. When it was done I was as big as Chris Hemsworth out of Thor! I was a man! After a quick measure I found I was 6ft 3 and 210 pounds! I was huge and I felt great. It was all muscle. I felt great! After flexing my tight eight pack I left the dressing rooms, bought a shirt and slipped it on. It was a bit tight which was good as it showed off my muscles. While I was in the shop I found that my voice has dropped to a rumbling bass. Suddenly an idea hit me, I ran back to the changing rooms and slipped off my trousers. Yep, I was right. My once small dick was now colossal. It must of been 9/10 inches. I couldn't believe what had happened. I'd gone from skinny wimp to buff stud. Without having to touch a gym membership. Those chemicals must have been very effective. I wondered about what they could have been. I'd always been smart, usually top of my class but not in PE. I think I can change that now. I ran back down to the beach. It seemed like a small journey because of my big strong legs. I immediately ran to those girls who had waved at me earlier. They giggled and invited me to a BBQ. The best looking one sat next to me. She was about 16 and was shocked to learn I was only 14. She joked about me being on steroids and I told her I could prove her wrong. She asked how and I just looked down. She gasped at the large bulge in my pants. She must have been quite smart since she immediately said it was stuffed. I blasted the lie and tucked in to the steak I'd been given. It was great, so lovely and juicy. After I'd finished I thanked them and went home. While I walked down the street with a tight shirt, tight jeans and no shoes I got many looks. Both envious and flirty. I got home and my little brother opened the door. He looked up and his jaw hung open. "Hey little guy!" I said in my deep voice. He didn't say anything, just stared. I lifted him up and walked him into the house. He seemed so light that I carried him with one arm. "What happened?" He asked sounding a slight bit worried. "Erm... I hit a bit of a growth spurt" I replied "But your muscles are huge!" "Well they grew too!" I laughed "Can I feel? Dad always let's me feel his!" I knelt down as he poked and prodded my beefy arms. I tensed and he attempted to push down the balls of muscle. Then I stood up and he pulled up my shirt. "Someone cut up your tummy!" He was only six, he had no idea what an eight pack was. "No Tom, it's called my ab muscles! It means I have big stomach muscles!" He wowed and wooed while he punched them. After a round of piggy backs he got bored and went to watch TV. I ran upstairs and immediately took off my shirt. I still loved the sight of my smooth muscle. My pecs were big and firm and my arms were large and toned. I'd have to buy a few new shirts but hey ho its a small sacrifice for a body like this!