Looking for a specific Spock/Mccoy fic

[sablemouse.livejournal.com]

I'm looking for a specific Spock/Mccoy fic with the stxi characters. I think this may have been on one of the kink memes but I'm not sure. What I remember was that it was an established Spock/Mccoy relationship and Bones was worried about Spock's approaching pon farr. But this wasn't just regular pon farr but some sort of alien!peen fic with cat-like spines on spock's penis. Spock decides to show Bones he won't hurt him and there is some fisting involved. I'm really sorry that I can't remember more detail than the really bizarre aspects of this fic but I hope someone can put me out of my misery. Thanks in advance.