I try to avoid using the urinals as well. I develop shy bladder if there's a person immediately beside me. I simply cannot initiate the flow until that person leaves. Needless to say this is quite awkward as I'm usually left standing at the urinal holding my dick counting the seconds.
Buying condoms is always awkward as well. I try to pick up a lot of them at a time so that I don't have to buy them too often. Then again, having the cashier ring up a couple boxes of 12 is pretty awkward with people waiting in line behind you. And the few times the cashier has given me my change and said "have a good evening" , I've always responded with a "Thanks, I will" followed by a smirk. I can't help myself.