As soon as Guy got home, he pulled the vial of ointment from the store bag with all the zeal of a kid opening a christmas present. Within minutes, he was stripped out of his clothes and slathering the stuff all over himself. There were a few places on his back where it took him some extra effort, but before long he was coated from head to toe.
He'd done what the man told him to, and now all that was left was to wait anxiously for the changes. Positioning himself before a tall mirror so he could see himself fully, he could hardly contain his excitement and watched in anticipation as... nothing happened. No added inches of height, no extra bulges of muscle, nothing... down there. He was exactly the same as he'd been when he left the store.
"I guess it's about time I got used to-"
BAMF! The strange noise startled him from his thought, and as he looked back in the mirror he saw that his arms had grown to herculean proportions - he could probably lift a piano with arms like these! All the excitement of the new arms made him begin to breathe much faster, and as he did all he could do was watch in amazement as every breathe seemed to add more muscle, more tone, more power to his chest. Just as that began to match his arms, he found that he'd breathed in some dust. A massive sneeze sent shockwaves through his body, and when he regained his composure he could see that his abdomen was now a flawlessly sculpted six pack, with his now massive legs supporting his new torso. In all of this, he'd failed to notice that he'd gained a couple of feet in height and a couple of inches in "length".
Guy's now-flawless body was hairless aside from his head, just as he'd requested, and even looked like it had become slightly more tanned to match his sculpted physique. He may not have been a slouch physically before, but now the ointment had given him incredible muscles that made him a living Adonis. Guy's new body was perfect.