> Maybe women are smart enough to avoid that particular form of stupidity and thus avoid the field, but men are too dumb, thus maleness ratio increases.

To quote Philip Greenspun:

> I've taught a fair number of women students in electrical engineering and computer science classes over the years. I can give you a list of the ones who had the best heads on their shoulders and were the most thoughtful about planning out the rest of their lives. Their names are on files in my "medical school recommendations" directory.

http://philip.greenspun.com/careers/women-in-science