I think it's only the guys who are insecure about it who really care;
Most girls on here don't really insult guys about it, it's more so the way men perceive how women talk about it. Several girls will say penis size doesn't matter, but one girl says she likes a bigger penis, and all hell breaks loose on the male side of things, because too many guys lack confidence.
It's not like your suddenly less desirable if your penis ain't 12 inches or whatever - there's more to a man than his damn size. That's how I see it at least. There's too much focus on a male's size, like there's too much focus on a woman's shape; and it causes people to criticize themselves and feel like they don't measure up.
It's crap honestly, and people need to quit letting the opinions of others effect them so much.
I'm not perfect, I don't have huge breast, I don't have that hourglass figure, some men think I'm pretty some don't, I'm no fashionista -
I'm far from the standards set for me, and I don't and probably won't ever measure up to them;
But I'm not ashamed of that, because I'm totally comfortable with who I am :)