It is a well-known phenomenon that impotent men buy Corvettes. Since the true penis can no longer function as a private, inner status symbol, the poor old guy gets himself a functioning public status symbol. It's kinda like beating up homosexuals to prove how straight you are, when you are really a closeted queer.
On the internet, I can't wave my cock around and show you how big it is, and therefore how awesome I am. Well, actually, I can, but you wouldn't see it. So I have to have post counts, and green lights, and Linux cred, and a meaningful username that is neither cliche nor obscure, and all that other stuff - public symbols of my awesomeness. When you see stuff like that, you KNOW I am badass.
Yeah, epenis is a made up word. But I think it fits well.