Couple of things. I couldn't have unlocked both, as the doors swing shut and relock as soon as you let them go. The customer was a natural born woman who looked and sounded a lot like a male. When they asked why I opened the men's, I just told them the women's was occupied. I have never made the mistake before and it was mortifying. She luckily was very cool about it:) also, both restrooms use the same key.