NewGeekPhilosopher said:
There's more to it than that, first of all you have to be considered not a homosexual (which on the internet is vaguely defined/increasingly offensive to straight people who do things that get them lumped in this group without even being attracted to the same gender), you have to not be fat (which is often hypocritical), not earn less money than your wife, and for some reason you have to be a fan of your national sports because if you aren't you aren't considered a man.
The above measures of manliness are ridiculous, and are no help to any man at any point in history. Because being a man is so loosely defined, peeing standing up or sitting down is but one facet of it.
Oh, and I pee standing up but I'm STILL not considered a man by many people's standards. Just look at my avatar for example.
Call me cruel, but a fat, broke gay dude, who hates sports is not exactly the alpha male.
A true man has to be in control, wheter it's a huge company or just himself. Someone who doesn't have control over his body or career is just life's punching bag.
As for the "real man can't be gay" thing... well, it's obviously unfair, but there is something to it. I mean a real man is a conqueror, he conquers women's hearts with the sheer power of his awesomeness, from what I've seen it doesn't work that way in gay mating rituals.