I don't know what the deal is, it's obviously psychological. I've been like this since I can remember.

Are you a small man son?

I'm black

That just means you have small balls and creates an optical illusion that you have a larger organ

Only when I'm slump busting with Tiger Woods.....

I just whip it out and the stream flows

nope... In the military we don't worry about this. I can tell they guys that have problems pissing when they get all close to the urinal when there is a dam splash guard at the bottom.

When you go to the bathroom are you thinking about who is going to see ur penis or are you focused on coating the urinal with man-fire?

Try singing a song while you piss. It will work.

This is just a form of anxiety. Lots of resources out there available to help deal with this sort of problem.

It has nothing to do with not wanting anyone to see my member. I can't explain it, because I don't understand it.

Another fitting question for this discussion, why do you care about what anyone else thinks about you when you're trying to pee? Seriously, it's a natural bodily function.

It sounds like a goofy question, but you said that this manifests itself when you feel like someone is waiting on you.

Bingo. Same.

The trick is to do something like double or triple digit math(multiplication).
Your brain focuses on that process and relaxes your pee pipe enough to go.

There is a shower scene in American History X that helped me relax.

Have the guy in the next stall to stick his finger in your ass