:D I like that world, it's got a great capacity for both intra- and inter-race tension. One of the things I'm most interested in world-building is what the different cultures and customs that spring up because of (or in spite of) what makes them unique; the idea the tumans are the most romantic is nice and I would love to see what some of their art works and appreciations would be. I think the other races would definitely have gendered pronouns, and that could be a point of conflict that travellers often stumble into. Should tumans have to have a big warning sign saying what pronouns to use? I imagine not, but the other races both being binary gendered would definitely demand that information to be displayed somewhere. Maybe you should check out Star Trek TNG 5x17: The Outcast where Riker falls in love with a member of a genderless alien species.