fetish
Teratophilia
A fetish or romantic fixation on monsters, mutants, and other nonhuman or visibly monstrous beings, where the creature's difference is the source of desire rather than something to overlook. In romance and erotica it covers everything from minotaurs and demons to aliens and beast-shifters who keep their inhuman form.
Why readers love it
Readers are drawn to the total removal of social pretense: a monster wants what it wants, and its partner is desired precisely for being human and soft by contrast. That power gap and the accompanying fear of being devoured or claimed give the pairing a charge that ordinary human love interests rarely match.
Also called
monster romance
monsterfucking
beast romance
monster lover
creature feature
xenophilia
cryptid romance
eldritch romance
Worth knowing: Fantasy monster dynamics often lean on size, strength, or predation themes, so real-world versions of that play call for clearly agreed limits, safewords, and checking in afterward.