Historically, girls have not been encouraged to be scientists, to be explorers, and there's a social kind of constraint, of course. Having the responsibility, a disproportionate part of the responsibility, for caring for families, caring for children. I know this challenge from firsthand experience because I have three children and four grandsons. And some of the time I have spent as a scientist and as an explorer has meant choosing to not be with my children and grandchildren as much as I might otherwise have done had I not been a scientist, an explorer.
There's a reason why trainspotters are not girls, there's a reason why there's the myth of the slightly autistic male genius, there's a reason why Gertrude Stein believed that her self-presentation was male. One could argue that was Susan Sontag also. The things that we associate with femaleness are not the single-minded, exclusive pursuit of a vocation, whether it be art or anything else. It is not a model that is widespread in our culture, it's not something we think of for women.