Title: Corpus Hominis
Author: mycapeisplaid
Fandom: Sherlock
Characters: John/Sherlock, Mycroft
Warning: NC-17, slash
Length: Medium
Status: Completed
John knows the human body intimately. He’s had plenty of opportunity for study as a doctor, soldier, and lover. There’s one particular body, however, he knows very little about. When Sherlock launches himself head-first into a new obsession and they get sent on a case in an unlikely location, the pair discovers each other’s bodies with confusing yet delightful (and sometimes hilarious) results.
At AO3
This is a casefic set in a wellness resort. During their stay John and Sherlock discover each other in more intimate ways than ever - and I loved Sherlock's jealousy. Cute, in a way.