Interesting question

“Hmm, I guess I really need to think about it carefully. I mean, I can pick out whatever form I want right? I mean, I’ve kinda always wondered what it would be like-”

Anna cut him off. “Alpha protocol pre-selected. The host will be **** for (6) hours. Beginning host enhancement.” Adam’s eyes rolled to the back of his head. His body went limp. Luckily for him as over the next six hours every one of his muscles twitched and vibrated, suffusing themselves with a dull burn that mimicked actual exercise only a few thousand times faster. The nanites removing or repairing damaged cells as quickly as possible, burning available fat deposits to make up for the extra mass. His limbs grew in proportion. His chest thickened and his waist pulled in. His bone density increased even as his flexibility increased. Meanwhile the nanites managed a dozen other processes that kept his body from cannibalizing itself. Structurally speaking he was stronger, faster and more durable than even the topmost humanity had to offer, specifically designed so that upper command could be maintained. If only his predecessor had been so lucky.

The nanites had, on a global level, scaled back the fertility of males in order to account for the longer lifespans of their hosts. Adam wouldn’t have qualified as even average size before humanity’s exposure and he barely qualified after. Host enhancement apparently included the reversal of these limiters. His cock increased in size proportionally to his new form. Various other changes were made to his physiology, his refractory period was shortened dramatically. His sperm count was expanded, despite the disproportionate increase in seminal volume. His balls were altered so that any genetic material produced would be greatly superior to any other rival seed.

When Adam finally awoke he was covered in a thick layer of sweat, that had left him laying in a pool in his bed. He lurched drunkenly to his feet and tried to beeline towards the kitchen, ripping the door off of its hinges as he stumbled into the main living room of his shit apartment. At the fridge he began scarfing down anything he could get his hands on. Leftover take out, how old was that? Doesn’t matter, down the hatch. He ate a weeks worth of groceries in minutes. Then he moved on to his rainy day food. Cans of beans. Torn open with his bare fists. Rice. Yeah, eat it uncooked, that’s probably fine.

By the time he was done he thought he would be tired, but he felt great. He felt energized like a good nights sleep followed by a fantastic workout and a delicious breakfast. He felt he could take on the world.

“Host enhancement complete. Task completed. (4) Tasks remaining.” Anna gave him a full rundown of all of the changes made, as he inspected himself in the bathroom mirror. He looked down. Pulling on the waistband of his boxers he got his first real look at his new equipment. Ever since the exposure the porn industry had taken a real hit. First was a lack of interest. As the male crowd had less interest in porn than they did in women. Second was the unavailability of male leads. Adam’s new equipment would qualify him to name his own price. Even soft it hung out the leg of his boxers. A smile cracked its way over his face.

His alarm went off.

Fuck! Work. He slammed the top of the box and accidentally crushed it with one meaty fist. Of course none of his clothes fit. He managed to find a pair of loose basketball shorts and a tank top. He called his work telling them that he was going to be late. He thought about just quitting, becoming a male model or a pornstar, but he wasn’t going to take the chance that there was more there related to the nanites. If it was there he was going to find it first.