The not so epic romance of Dorian Pavus of the illustrious House Pavus and Hissrad-- more commonly known as The Iron Bull-- of the Ben-Hassrath.

“Do you have any kinks?” Viktor looked down at Phichit, surprised. “Excuse me?” “Fetishes. Turn-ons. Things that make you go, ‘Oooh! Wow! Yeah!’” “I know what a kink is. Why are you asking me that kind of question?” “Don’t look so scandalized. It’s for my psychology project. Which I just told you about, but you were too busy drooling over Yuuri to listen,” Phichit said. (post episode 7 - In which Viktor is enlightened, Phichit is a little shit, and Yuuri frantically searches for ways to keep surprising Viktor)

Sure, getting fucked by tentacles was a rare, once in two lifetimes kind of experience. But honestly, once you went demon dick there's no going back. OR Shang Qinghua (and Shen Qingqiu) gets tentacle-fucked but Shang Qinghua is still helplessly horny for a certain ice demon.