Sherlock Has No Gag Reflex (and John can't get over it)
Status
Summary
John learns that Sherlock has no gag reflex. At all. He tries desperately to ignore the train of thought this revelation leads to, but Sherlock deduces well enough for the both of them. And doesn't mind practical demonstrations. (Warning for a particularly gross crime scene and John vomiting. And Sherlock NOT vomiting, as it so happens.)