Guy looked at his enormous cock, at his grapefruit-size balls, at the whole muscled hunk of his enormous nine-foot-height and then shivered as he felt himself begin to grow again. Just a little bit. Only three inches taller and a little bit more muscular and a little bit longer with faintly bigger balls, now the size of large grapefruit, but a growth spurt all the same.
Guy ran his hands over himself, happy, and thinking about what he'd asked the old Chinese man for. Well, he'd said "close to" 9 feet tall, not "exactly," and he wasn't going to get upset about an extra three inches. Over the course of the next half hour inspecting himself, guy felt his balls swelling, refilling themselves with cum, and he decided he might as well empty it out again. It felt so go and he'd still have enough for a decent load, even if not an amazing one like before.
He stroked himself off, shivering with delight as he came, and watched his balls shrink back to the size of large grapefruits. Then they pulsed, swelling larger and slightly larger, and then he shivered as the growth spread out, his cock growing longer and his muscles swelling and then the rest of him as well until at last he stood 9'9"
"What the?" Guy gasped, then realized that what he'd asked Mr. Yuan for had been for him to grow stronger whenever he worked out or had sex or just about anything, and evidently self pleasure counted as sex.
What's more, he'd asked for his balls to fill such that he'd need to have sex at least ten times a day....