Actually, to get this more on the borderline-problem that Elrohir was wondering about:
How many here would be okay with a trans-gendered person watching your junk as you pee in a cup, but would not be okay with it if it was a woman watching?
I think Elrohir is asking a quite interesting question. I will never be "hurt" by strangers looking at my junk, and I really doubt that peeing in a cup is an ideal situation to hit on a woman if she would happen to be attractive (in a job like this? - yeah, right!), so it really doesn't matter who looks, as long as they're professional about it.
Though I've never had people actually watching my junk while peeing. I have peed in a cup under time-pressure with a long line of other guys also having to pee in a cup behind me and to my sides, and a doctor watching that no-one "cheats" in an obvious way (wasn't something anybody would want to cheat on anyway). While that was uncomfortable, it didn't really bother me. I think the situation considered in this discussion would be equal in comfortness-level for me...