Your dick, of course

It seems like the next logical thought.
You carefully click on the underwear of the avatar of you on the device, but nothing happens.
Quickly, you understand, and strip off your underwear, which gives you a chance to look at your penis as it is now.
It´s around average, maybe a bit more, maybe a bit less. Enough to keep up, but not enough to make chins drop when they first see it.
But all of that was about to change.
Right now, in its soft state, it was maybe 4 inches. You close your hand around it for a moment and begin to get yourself hard. With the exitement of the situation it doesnt take long, and a minute or so later, your dick is errected to its full length.

You look back at the device, to see that your character is nude now, just as you, and that its dick is errected as well.

Again, very carefully, you click on the image of your cock, and it zooms in. The settings appear, seemingly giving you control over lenght and girthiness, as well as the size of your balls.