No one in 40k talks about who their parents were or if they have children.
+++++But sex has to be a big deal to them still? Because they're somehow lesser without the need to **** every now and then?+++++
Well, like I say, would you want to be a Space Marine if it meant giving up your sexuality?
My default position is that Marines sole purpose is to be as attractive as possible to fourteen year old boys (and men trying to recapture the feeling of being fourteen year old boys).
Maybe characters who don't do that soppy stuff ARE most attractive to that kind of person. I remember at the time thinking it was odd that every book had to take time off from the action to insert a sex scene. But even then I'd have thought that the ideal is where it just doesn't come up, rather than characters who are nervous and confused about the subject.
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And quite apart from anything else, I like seeing characters hook up. Even if 40k. I don't know about anyone else, but I am still kinda hoping Eisenhorn and Bequin can somehow make it work despite it all (yknow - her being Untouchable and, er, Brain Dead, and him being an Arch Radical).