In Avatar the Last Airbender, we see from flashbacks that Aang grew up in the Southern Air Temple, a monastery of all men. In fact, the only female Airbender that I recall seeing in the series is Avatar Yangchen, and only as a past life of Aang. Given this distinct lack of women: where do Airbender babies come from?
Do there exist Air Temples of women (and if so, how do they arrange to meet together to procreate)? I'm guessing that they don't come from other nations, given that the Air Nomads are considered a "nation" of its own and inter-nation marriages seem virtually non-existent before their demise. So who are these mothers and how do they meet up with the father Airbenders?
I'm interested in society around the time that Aang was born. Obviously by the time of The Legend of Korra, Tenzin and his wife Pema were the parents of the only Airbender children in the world, at least until the events of Book 3.