Sherlock is a necrophiliac. He's never indulged it and it's not something he's proud of. He finds it easier to nip the whole topic of sexuality in the bud by telling people that he's asexual.

Molly helped pay her way through college and med school by catering to men with Sherlock's proclivity. A high tolerance for pain (so she could withstand the ice bath to drop her body temp) and an ability to control her heart rate meant she was extremely convincing, and thus popular, and the work suited her because she wasn't required to make conversation.

When Sherlock discovers this he asks to contract her services and she agrees. Or perhaps it becomes another way that Molly helps him, Sherlock calling her in advance when he's stressed so she can prepare.

Perhaps after a while John could be brought in to watch if you'd like that.


(This whole prompt is born of a visual i have of Molly preparing for one of their sessions much the way Tippi prepared for her own Necrophiliac client in Satisfaction. With the ice bath and the powder to look like a fresh corpse. And then Sherlock coming in to 'discover' her left alone under the crime scene sheet.)