The other brilliant thing about achieving comfort with one another's bodies is that he knows how far he can take Watson; he knows what liberties he can take, what angle to drive his hips, how and where best to apply what nails he has. Holmes's observational skills are a gift at all times, but particularly so in matters of sex. Watson is far gone, and Holmes is far gone, and the both of them only too recently reached a wonderfully satisfying climax. There's no reason for preamble, in that case, and he knows he can skip it safely, can move right onto something a little more vigorous without raising complaint.

So that is precisely what he does, driving his hips into Watson with a confident force.