Micro.

I saw a man with a micropenis a ways back. At first I thought he'd had it amputated or something (he had normal testicles), but no, it was there, just... not large. It wasn't the size of my pinky--it was the size of my pinky knuckle. He was married.

And I realized, when I thought about it, that their sex life is probably amazing. Something like that forces you to think and talk about sex. When your penis is half an inch long you just can't coast by on "I get on top and stick it in her and that's sex, right?"; you have to get good with your hands and mouth, with being open to using toys, and with communicating what gives you pleasure. It's possible that he has a really intense denial thing going on, or the just have a (happily or not) sexless marriage, but I'd lay better than even odds that having a half-inch penis makes a man great in bed.