:D There's one on AO3 that it's really hard for me to link. It's so full of typos, but yet.

http://archiveofourown.org/works/224907/chapters/340216

And then there was one on the Sherlock kink meme that I've sadly lost. Woe. It involved people finding their ~soulmate by shaking someone's hand. And of course Sherlock and John are soulmates! \o/

And then there's this fic which is really good but sadly a WIP and hasn't been updated in ages. :( (I really need to stop reading WIPs. It never ends well.)

http://velvet-mace.livejournal.com/340223.html