Posted 20 February 2015 - 02:54 PM
Monsno, while your point about menstrual blood definitely has its place, I think there are quite a few male mysteries which have an equal place in magic, such as being the seed carrier and a more intense connection to virility. Both seed and moon blood hold the potential of a life which has been lost, and both can be given.
This is what is precious about different sexes, is the innate level of individuality which comes with it, even on something as simple as the "male/female" sex scale. Gender, on the other hand, I think, can plug people in on quite a different basis, and where ones identification lies can give them access to certain "male" or "female" keyholes. For example, a trans woman does not bleed, but neither does a physical woman with sever PCOS, nor does a woman who has had a hysterectomy. While I do not know from personal experience, I cannot imagine that locks them out of many, or any, particularly female practices.