Manesia (noun)  - forgetting who a man is even if you have been introduced before to him several times. This happens mainly  because men tend to dress similarly in a uniform of untucked striped shirts, jeans, and new balance sneakers.  Also there is not a lot diversity of facial hair or haircut style,  so it may be difficult to differentiate this guy from others.  This condition can affect both men and women, but primarily women. A good way to ward off manesia is for men to obtain a personality, be charming and gracious.  European accents help as well.