David glanced at an age slider. He curiously slid it from 10 to 18. Then, he pressed enter.
David began to feel hot. He took his shirt off and lay on. He he couch. David knew no one would stop by in a while. Besides, his shirt had started to get tight anyways. Slowly, he began to grow. All baby fat disappeared from his body and face. He kicked off his shoes. They felt tight as well. David watched his feet grow bigger.
"Cool!" he exclaimed in excitement. David began to feel a tingling at his crotch, but he ignored it. Faint hairs appeared on his arms and legs. David looked around 13 and stood about 5' tall.
David soon hit his growth spurt.
"Woah!" , he blurted out as he stretched taller and taller, "I'm getting taLLER!". His voice cracked and began to change. David felt more sensations. More leg hairs startted to poke their way through. The faint hair on his arms gained more presence. David raised his arm to see hair squirming out of his armpit. Peach fuzz spread across his upper lip. Eventually, his shorts burst from his increase in size. Now, he was only in his underwear. His body had become lanky from the growth spurt.
"I can't believe this!" he cried out in a deeper voice that was a couple octaves deeper. David gasped and reached to his throat to feel an Adam's apple. He had seen quite a few bushy hairs in his underwear. He saw that his genitals had gone through a spurt as well. David looked about 15 and stood around 5'9".
His height growth slowed down, only to be replaced by muscle and hair growth. His calves and thighs swelled up and gained even more hairs than before. The pressure caused his underwear to snap painfully.
"Ouch!" he yelped. Now completely naked, he saw that his balls and dick were still growing and that his bush was multiplying. A trail flew up to meet sprouting chest hairs. David began to gain abs while his pecs pushed out. His biceps ballooned. David flexed his impressive arm and noticed that his underarm hair was now bushier. His Adam's apple potruded out more. Finally, his jaw squared off as stubble appeared
The changes stopped. There stood David as an 18 year-old. He was 6' tall, muscular, decently hairy, and had a seven-incher hanging.