The second story in The Cosmic Fuck Series. Kirk and Spock deal with the aftermath of their pon farr encounter. First published in Thrust in 1978.

This is a K/S story in which Kirk encounters an alternate universe Spock who has been raised on Earth and chosen his Human heritage.  He is the leader of a dance troupe, and has some dark history with the Kirk of his own universe.

In a magical cave, Kirk and Spock meet each other’s mirror counterparts in what might be dreams. 

"Mirrors of Mind and Flesh" was originally published as a stand-alone print fanzine novel in 1979.

Author's Note: 

"Since this was a first time story separate from the Cosmic Collected universe, I decided to design a different cock for Spock. That was fun. I wanted a double hot fudge sundae of erotica and hope I succeeded, but the story itself was very difficult to write - trying to get the mirroring to work effectively without being repetitive. And I wanted to do a Mirror story. Although I’d always rather thought the Mirror Spock should take Jim’s advice and take over the Enterprise, the Mirror Spock wanted to save his Captain. Of course."

I don't remember the exact origins of this story, but I was reading a great deal of fantasy in that era. Spock had a special magic for me as a character and returning that magic by making him a sorcerer had great appeal. And, of course, what would Jim or Spock do if the other died was a never-ending question. I rather like this answer.

First published in Galactic Discourse 3, 1980.