Molly for sure knows that Sherlock's arse is a work of art. At least in his tight trousers anyway. She's had enough glimpses of it as he was bent over a body or microscope over the years. She should feel guilty about all the times she checked it out, but she doesn't. If he ever knew, she's sure he liked the attention. Sherlock likes attention.

When he takes her nipple into his mouth, her sigh becomes a whimper and her eyes slip shut at the sudden sharp feeling of pleasure that travels through her body. She wonders how he can possibly be doing this for the first time. How does he know? Her earliest and most inexperienced sexual partners had all been fumbling with seemingly no interest in what would make her feel good.