Seriously how often do you think people sit around thinking about the size of their dick?
Quite frequently, if they're anything like me. For me it goes something like this: if I've been looking in the mirror on a cold, winter day, I'm usually kind of depressed, cause I wish it were bigger. But if it's a particularly warm day, or if I just got out of a hot shower, I think "AWESOME. That looks great!" and I can't wait to head for the nude beach. I imagine most guys have similar thoughts even if not as frequently as I do. But it has nothing to do with guns, so I guess I agree with your basic point.
I swear we need to define a new logical fallacy revolving around this.
I guess it would be called a "phallacy".