Yay, someone likes that series! I mean, I know people like them, but I didn’t know anybody liked them enough to ask about them. ^_^ Not that I expected it; they really are as frivolous and shallow as they seem to be.
So, a fact: I wrote the first story in the series for a prompt about Sherlock collaring John “because he’s Sherlock’s bitch.” Of course, in the story John does not get collared and the title is No One’s Bitch. It was meant to be ironic, because the one thing that is as true as ever about John Watson is that yes, of course he is Sherlock’s bitch. ^_^ But I don’t think the prompter got the joke. Oops.
(On the other hand, Sherlock is still holding out hope on the collaring front, so who knows?)
Another fact which is too lame to be a good answer is that I regret making those stories standalones in a series, because they’ve turned out to more properly be chapters in a fic.