When I graduated University I was pretty blown away by the number of lesbian women who play hockey. I don't mean that in a bad way, it was just interesting to me that the number suddenly skyrocketed. I have no idea if that's just a consequence of increased age of the population I was dealing with (more time for people to have come out, perhaps increased comfort level with being out compared to younger people, I have no idea), but it was certainly a significant increase from all my hockey teams prior to that (University and high school).
Anyway, I'm very open to people being whatever sexual orientation rings their bell. I did sort of have a moment of "Well, this is interesting that we're all in the same dressing room, but technically someone in here could be checking me out the way a man might if this were a co-ed dressing room". Now, that said, the level to which I get naked in a hockey dressing room is about the same as going to a public beach so I'd be comfortable with men being present anyway, and if I were to undress more I would quite honestly be uncomfortable doing so even in front of other heterosexual women (I'd go to the bathroom if I needed to take off my under garments). So really it didn't matter to me, but I did think about it as just an interesting aside.
Ultimately, I like to think that all human beings have some sort of decency and impulse control, and I would expect the same level of that from anyone - man, woman, transgendered, gay/lesbian/straight.