The “Obligatory Bathroom Mirror” Face
Often people confuse this face with the the “passive one-way mirror” face which, contrary to popular belief, does not exist. The laws of physics do not allow for real, passive one-way mirrors or windows (ones that do not need external energy); if such a device were possible, one could break the second law of thermodynamics and make energy flow from a cold object to a hot one, by placing such a mirror between them.
So, whatever is going in women’s washrooms, is beyond me.