I have been a geek for most of my life. However, my geek identity is rarely recognized in meatspace interactions, probably because I am female. You would expect that people’s assumptions about the science, math, and tech abilities of girls and women would be challenged upon encountering female geeks in real life, but I have found that being a female geek actually reinforces sexist convictions that girls and women do not really belong in science, math, and tech.
I remember when I won some physics award in high school, a male rival complained bitterly in the library that the physics award he felt he should have won ended up going to “some girl”. He actually said that, emphasizing the word girl, as if my very gender invalidates my right to win a physics award. He complained loudly on purpose so that I would overhear the barb. I was shocked that people could say such blatantly sexist things in [current year], in which sexism was no longer supposed to exist, especially among my youthful generation. Instead of challenging gender stereotypes, my physics geekery apparently reinforced this guy’s perception that male rights are being eroded by uppity females who get awards we don’t really deserve. If he remembers me at all, he probably won’t remember me as the geeky girl in the library, but as some bitch from high school.

Often, computer geeks who started programming at a young age brag about it, as it is a source of geeky prestige. However, most computer geeks are oblivious to the fact that your parents being able to afford a computer back in the 1980s is a product of class privilege, not your innate geekiness. Additionally, the child’s gender affects how much the parents are willing to financially invest in the child’s computer education. If parents in the 1980s think that it is unlikely their eight-year-old daughter will have a career in technology, then purchasing a computer may seem like a frivolous expense.
Most male geeks* believe that they are subverting traditional masculinity by reclaiming and self-identifying with the term “geek”. For most male geeks, geek identity is defined partly as a rejection of the “jock” identity. According to the traditional high school male social hierarchy, jocks are high-status males and male geeks are low-status males; jocks are alpha males and male geeks are beta males; jocks are masculine and male geeks are “effeminate”. Thus, when a man proudly self-identifies as a “geek” in response, what he is doing is redefining what it is to be a man, redefining geek identity as masculine.