Either Sherlock/John or Sherlock/Lestrade. Either John or Lestrade has been dosed with Cuddle Pollen. It's like sex pollen, accept it's just hardcore cuddling and comforting instead, with all terms of endearments thrown in as well.

The first person they see are the person they direct their cuddling needs at, and Sherlock happens to be that first person. Whilst lying on the couch in post-haste blues.

I'm that desperate for such a thing, I'd even take John/Sherlock/Lestrade, with John and Lestrade being dosed and Sherlock being cuddled the hell out of by both of them.