Sherlock needs John. John lights up around Sherlock. Mary loves her boys and thinks this is a lot less complicated than they are making it. Set right after TEH and before SoT. Fast turning into a bloody epic season three fix-it.

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.