Interesting, rebel; your Facebook comment made me think...
According to just a quick Facebook text search, there are lots of people who post about changing clothes in the parking lot of the gym rather than in the dressing room... some because they are uncomfortable changing in the gym dressing room in close contact with others because they were victims of childhood sexual abuse in the school locker rooms by... applies to men and women both. I had no idea.
So, I am wondering if this guy you are dissing is a rape or child abuse victim who is more comfortable changing where he can be seen (and helped by others in an emergency) rather than chance doing so in a space he views as dangerous.
Just a thought...