Awkwardness at the Public Urinal

I walked into the bathroom today at the office I work in. There was another guy in there who I've seen around before but don't know too well (I'm kind-of new here). We greeted one another with a hearty "How ya doin?'" and preceded almost at the same time to the pair of adjacent urinals on the wall.

We unzipped and .... waited .... waited (I painstakingly focused on a spot up, and to the left in front of me on the wall -- the opposite direction of my colleague's struggles to my right) ... and waited. At long last -- after what seemed like minutes but may have only been 30 seconds -- a small, sporadic trickle issued from my member, picking up more and more steam as I heard my compadre's efforts finally yielding beside me. After a few seconds of tentative drops and 'on-off' disorder, each of us miraculously achieved total flow -- the liquid issuing from our crotches like stringent faucets -- and a palpable sense of psychological relief descended.

Why is it so awkward to pee in front of someone you don't know? Are we that ashamed of our sex organs? Are bodily functions inherently embarrassing? Is mistrust of our fellow man so great that even mild-mannered co-workers spook us out of emptying our overflowing bladders?

If you, delicate reader, have any answers to this inscrutable conundrum, please send them to me. Of course, this would require people to read this blog -- and I'm not convinced that's happening -- but it ain't nevr hert nobahdy fir tryin'!