Nobody's forcing you to look at any guy's cock.
In regard to your claim that it's not about being uptight about male nudity, you sure as hell come off that way considering you seem to think it's on a par with rape if anyone happens to see your little wee wee in the shower. Do you make the women you fuck (yeah, right) sign confidentiality agreements before you drop your pants? What did you do when your mother changed your diaper? You never gave her permission to see it either or did you just go around in a shitty diaper all the time? Are you one of those guys who uses the stall to take a piss because you don't want some dirty queer catching a glimpse of what you like to refer to as your dick?
All men have cocks so I fail to see why so many men these days are raised to be ashamed of the fact that they're men (and have cocks).
The only reason anyone should be afraid to be seen naked in the shower when everyone is naked as well is if there's some Yentl scenario going on and they've been trying to pass themselves off as the sex which they're not.