I just hope he doesn't go all ancient elf supremacist. I really can't stand people have superiority complexes like that, or are racist at all for that matter.
It might be more about familiarity than supremacy, at least if you bother to befriend/romance him.
Think about it in a RL sense that's much less extreme. If you were in a foreign country where the language, culture, and people were very different from you, and came across a bar full of people from your home country, you'd probably gravitate toward them. It's not that you think your people are inherently superior; you just prefer what's familiar.
Though to bring it back to Solas, he definitely is racist against humans and qunari, dismissive of the modern dwarves, and varies between pitying the modern elves and despairing that they aren't his people. So...class act in that department 
I can't write smut. I think part of it is being willing to be really vulnerable with your sexual fantasies and such, and have really wild, tittilating ones.
You can also steamroller through the awkward. That's what I do 