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When I see a group of same-sex people sitting together (whether they are men or women), I can determine which have a more feminine vs. a more masculine energy compared to their companions. ... the guy will still have more masculine engergy than the girl. ... Of course some people have more noticeable gender cues than others.
There are many studies that show that most of us can accurately determine whether someone is male or female. Here's just a taste:
Near ceiling degree of accuracy, even when cues from hairstlyes, facial hair, and makeup are eliminated:
http://www.ncbi.nlm.nih.gov/pubmed/8474840
96% proper gender identification accuracy from photographs, even when hair is hidden:
http://www.perceptionweb.com/abstract.cgi?id=p220153
One of the differences between males and females is, there is more facial contrast among females and this explains why makeup works, since makeup increases the contrast by emphasizing individual features.
http://www.sciencedaily.com/releases...1020153100.htm