Tertiary paraphilias are non-sexual and non-romantic paraphilias. I personally find it a very interesting topic.
Mine are blood, gore, extracted teeth, mold, bones, corpses, abandoned buildings, and probably some more that I’m forgetting. I can’t really explain why my attraction to those things feel paraphilic, but it does. It’s arousing, but not in a sexual way like my other paraphilias are. I do not posess romantic attraction towards anything.
Interesting! I’m interested to hear more if you figure it out :)