I don't generally have a problem with another guy coming up and talking to me while I'm nude and/or changing, its when he starts to comment on my body I get a litter weirded out. Most the time its just locker room chat IE "Did you see who won the game last night?" Or "Did you get a load of that chick in the <Insert colour here>?" Then again most these guys also assume I am much older than I am
but other than that I have no problems with them.
Elvish