I grew up in the baby boomer days. Psychedelic, Beatles, Vietnam, protesting, Watergate and bra burning. Bra burning? What was the point in that? No pun intended. I know, men are from Mars and women are from Venus. We're different, but we were here first, right? My wife will beat me after reading this.
Seriously, though, men do live by a different set of rules. We don't really talk about them, but we all abide by them. It's born into us and we understand them.
Here is an unspoken rule for men:
Public restroom urinals. Men make a decision on which urinal to use based on three factors: a) How many urinals there are. b) How many other people are using them and c) How shy they are.
How many urinals are in a public restroom is the most important deciding factor. If there is one urinal, then it's a no-brainer. If there are two, it really doesn't make a difference either. If there are three urinals, it gets interesting. Men will always choose an outside urinal if all three are open. That way the next guy will take the other end and privacy is intact. If someone chooses the stall next to you while the end one is open, it's awkward.
Now, if there are four or more unrinals, all empty, we still take one of the end ones. The more distance, the better. Every man knows how hard it is to pee when someone is standing right next to you.
One other choice we make is whether to look down or stare up at the wall. Every man has his own style and preference on this. But, you NEVER look at the dude next to you. If you do, you will either get hit or hit on. Personally, I avoid either option.