I agree that this is abuse and that DGS should be protected from it.
On a different note, I know of the case of a 6yo girl with this problem. Her mother had taken her to physicians for two years without results. Finally, in exasperation, she took the child to an older, experienced chiropractor. After one session, the girl was better. It took only half a dozen sessions before the problem was permanently gone. The mother was so grateful she wrote up the experience for the doctor's 3-ring binder (which I paged through in the waiting room). I have been unable to find anything about this treatment by Googling, but it might be worth a few phone calls. My understanding is that the nerves were not relaying enough sensory information for the child to know when to get to the bathroom, and the chiropractic treatment re-aligned something. This would not be a problem specifically for one gender or another.