We must conclude that executive women qualify as ubermales or are nonexistent. Or their bathroom is far removed from the work area.
It's another one of those subtle cues that we don't belong.
I understand that a comic strip is a small box, and including a women's room may have been physically impossible (perhaps where the wall art hangs?). However, the fact that women executives are few and far enough between to make this scenario feasible is sad.