Horned, monstrous lovers show up with tails, wings, claws, and other hellish features, usually bringing a dark supernatural vibe to the sex. The art often leans into domination, corruption, and “deals” that end with someone getting fucked hard, marked, or magically restrained. You’ll commonly see glowing eyes, runes, infernal settings, and a lot of focus on inhuman anatomy doing nasty things to human bodies.