I wonder if it has gone out of style...
But in the old days of Trek fandom, there was a lot of fringe focus on what was known as K/S stories, usually written by females fans who wanted Kirk and Spock to do what we would now call the Brokeback Mountain Effect.
http://cosmicduckling.com/spirk/links.htm
Apparently it is still around. I think a lot of it stems from a misunderstanding of male friendship.
