"Historic (and to a very tiny degree, modern) Albania had the “sworn virgins”. These were people born as woman who would swear an oath to never sleep with a man. They then would live in men’s clothing, could marry women, had men’s property rights, and so forth; they were legally treated as men. There was no reverse situation. The concept was created to deal with families who only had female heirs, and the person would often swear at a young age, but some people would swear later in life, so there’s some mix between “obligation” and “wanting” in the concept."
— Has anyone heard of this previously?

(Source: science.slashdot.org)