Men probably meant the general term men like human or people of their race, such as mankind means all humans not just men. It is really hard to say who actually said this. Was it Michel who was just telling it or did Thao actually use the term men? Since he wrote this after the fact I doubt he remembers the exact words used, so it was probably Michel who used the term men. Being of one sex he sees things as such and so choose the term men, but I think in the general use and not to designate sex. Remember he had a hard time seeing them as both male and female and referred to Thao as female. If Thao did use the term men, then Thao would see the word differently than you and I. Thao would probably not think of the word men as meaning the male sex since Thao is use to their race not being of one sex, so the word men simply means mankind, people of their race.