Most of this is no help to me. This is about human sex. I'm not writing about humans having sex. I'm writing about sex in an invented culture in an invented race.
But when I kept thinking about it, I realized these might be indirectly helpful. The Neif are going to have all the same hangups about sex that we humans do, but just in different ways. For example, is it gross to have sex after taking off the gloves you've been working in all day, so you're a little sticky? Do they like to have sex right after they go to the Reformery so they'll be all "fresh and clean?" Since they all have hands, and they're all the same size, does that remove the dominant/submissive aspect of sex that we humans tend to get tripped up by? I have my work cut out for me.