One of the key issues of all pattern recognition applications is gender recognition. Let us consider the case: you are using the very new pattern recognition and image processing application. You are a male (or female, it does not matter for this discussion, so you may take any side). You submit your photo and the system says you look like several pretty girls, together with your old photos and some of your male relatives. Very often you say: wow, it is not like in real life! The system made a wrong answer, it did not recognize me really, etc. Are you right?
The answer is quite simple: yes and no at the same time. Yes, you are, because you have rights to identify yourself with any gender. In particular, you do know that you are male, and everybody says it.This is because you have some gender characteristics including also visual appearance, behavior, lifestyle, etc. So the answer #1 is that you know your gender because you behave yourself and have social relationships rather than because you can SEE that you have particular gender. However, the situation become more complicated if consider other arguments.
Let us say you compare yourself with your mother and some unknown male persons. Who does match you better? Of course, your mother. It does not depend on gender issues. You mother looks more similar to you than any other males. You say: what about my father? I am male, so I look like my father. Just a moment: you look similar to your father AND you are male, however you might be more similar to your mother than father independently on the gender! And vice-versa, if you are female, you could resemble your father more than mother. Sorry, if it hurts you...

The answer #2 is that people can be associated with relatives of different sex natures by visual appearances.
Well, next consideration come to the head when considering new gender issues of democratic society. You know that people can associate themselves with any gender and use adornments to be closer to their gender identities. Are you sure you can distinguish such ladies and gentlemen from natural (I mean - originally natural) females and males under all circumstances by their visual appearances? So the answer #3 is that people can be associated with a different gender according to the specially arranged visual appearance.
Now about dresses. You say: I should be associated with men because I wear pants and do not use make-up (really?

). OK, please remember that many people from Africa, Latin America, Australia, etc., use make-up, while some of them are hunters. They are males, aren't they? About dress: Scottish traditional wear is a kilt. I think Scottish men are really men. The answer #4 is that people are not generally associated with gender according to the dress style.
Finally, we can find so many reasons on why people can hardly associate other people's gender using all social, behavioral and visual data, because main principle is vision and point of view. Therefore main task of the software which does not have any data on gender, is finding pictures by similarity, and only then by context. Context is a difficult task for text search systems also, while for image processing technique it means even more.
Use
www.picollator.com as the search system, rather than gender id system. Just for search, for digging huge multimedia resources. However, please note: we are working on context understanding as well...