This fic goes canon divergent for everything following Mary acting as a client in His Last Vow. Sherlock misses John. John misses Sherlock. Victor Trevor, Sherlock's oldest friend (and a super nice guy in this version) and participant in the 'great sexual experiment of '98' shows up to cuddle the hell out of a touch-starved Sherlock, get him talking, and get those two idiots back together. He'll work on Mary later. One fucked-up couple at a time is all he can handle.

They'd never talked about sex in the year they'd known each other. Well, that wasn't quite correct: Sherlock had never said a word about sex; John had bemoaned his personal dearth of it on many occasions.