Men's international Choice of Urinal Protocal

Women might not be aware, but there's a cross cultural, trans-national set of rules regulating how men use bathrooms. I don't know much about Europe, but everywhere from St. Mary's to Maine, the rules are the same, and never spoken. It also holds true in Canada. I can't speak to Mexico, since I've never been there. The rules are as follows:

1. Take the furthest urinal from the centre.
2. Don't stand next to anyone.
3. Don't look at anyone.
4. Don't talk to anyone.
5. For god's sake, don't even look at anyone!

Because of the rules, there are some bathroom configurations that are more efficient than others. Why use 4, when you can use 3? Believe it or not, some of us ponder this in some detail while... well, yeah. Well, leave it up to an engineer to apply a mathematical treatment to men's bathroom design! You read all about it at the XKCD blog. It's funny!