I am frequently disappointed to learn of ways which people get labelled. As a short, small, woman, who does social science in a computer science department I get to experience what I imaging are the consequences of such labelling. Of course we can't disown our cultural heritage ( I would be a real 'girls blouse' if I did ;-) There are cultural traditions, sometimes assumptions, sometimes unwritten rules, other time written rules which categorise individuals by their outward appearances rather than the use of actual evidence or clear logical thinking.
Sloppy thinking leads to decisions like the (now overturned) thinking of the International Association of Federations' ruling that Paula Radcliffe's women's world marathon record could not stand because she was 'paced' by a MAN!
Having heard of female students who have been told by their male colleagues that girl's can't program, I thought this illustration from the fabulous xkcd was just the ticket