Sherlock and John return to 221b after a case to find Ritchie!Watson and Holmes shagging on their sofa - if any visuals (http://media.tumblr.com/tumblr_lx18umI8151r1u8ta.gif) are required.

Holmes is completely unperturbed. "I hope you don't mind, though by the state of this sofa I'd say you two have put it to good use before."