system
Given the following post, respond as if you're commenting on Reddit:
human
[40k] So, what's sexuality like in the Imperium?

A broad topic here, but how are sexuality and sex viewed, discussed or represented (either officially or otherwise) in the Imperium? 

Further, are homosexuals tolerated? How about transexuals/transvestites? Or, in its endless drive for more bodies to throw into the Imperial Guard, does the Imperium only allow for a strictly reproductive heterosexuality?
gpt
Phew... Ok... Hard question... 

As with most things in the Imperium, this is going to vary. HUGELY. You're essentially taking every culture ever produced by human kind, and exaggerating that diversity across a million worlds. 

By and large, we know that romance and intimacy is permitted, and in many cases encouraged. It is love, after all, which drives the Emperor's guardianship over man. Stifling it kinda defeats the message.

However, some worlds exist in near feral states, others are hugely overpopulated Hells where life is cheap. Some are primitive agricultural steads, others are modernized, some are dedicated entirely to worship. The specifics of the world are going to influence individual acceptances, and on some planets (shrine worlds most likely) sex would he frowned upon in its entirety. Others may regularly engage in orgies to spread genes around and maximise reproduction and diversity.

For the most part, there are no sexual orientations or acts which seem unilaterally forbidden. Particularly indulgent activities can be a slippery slope towards Chaos, but since the general public isn't really aware of the threat of the Dark Gods, the first you hear about that is an inquisitors executing your entire neighborhood. Just in case.

Reeoduction doesn't seem to be a unilateral focus either. On feral world's, where every day is a struggle, maybe, but for the most part, through the Imperium as a whole, it's just something that happens.