...Great, you've awakened a colony of bunnies in my brain. Members of the various Ardan races whose sexuality is transgressive in some way (some way, rather, that doesn't involve homosexuality, as Eru dammit I've seen enough of that in fanfic). Incest, polygamy, fetishes...I'm not sure how transgressive asexuality would really be in the Tolkienverse...a fun outing for the whole family!