Sherlock Studies John's Flirting Methods

[vulpesvortex.livejournal.com]

I'm looking for a BBC fic where Sherlock makes a sort of study of John's courting habits, including a scene with another soldier at a bar (where Sherlock ends up secretly watching as the two have a go in an alley), and realizes he's jealous of John's lovers. They get together at the end, of course, where Sherlock comments that this isn't John's usual method of courtship, and John mentions something about the scene at the restaurant deterring him.