There was a science fiction book I read a while ago where someone who’d experienced the effects of time dilation emerges into a future where there is mandatory homosexuality. It’s not seen as a bad or a good thing (from the meta perspective of the book), just something that happens.

The people of the future this character emerges into see relationships between men and women as too fraught and dangerous — and primitive — so society moves to enforced compulsory same-sex relationships only. I was thinking about this in relation to how many (mostly) feminists wish to make being attracted to someone else morally verboten, or not permitted until it’s (somehow) authorized. The future portrayed in the book is a somewhat-likely future for us too I guess.

I can’t remember the book, though. It’s hard sometimes when you’ve read thousands of them.