Fortunately, he has Sherlock's impetuousness, self-loathing and rapidly growing fondness of degradation and filth to help steer.

He's on him in a second, before he can come all the way to the floor, stilling him, missing, nuzzling hip, then crotch, still sprawled between his slightly spread stance, but eager about it now. He tries to remember what he knows about sexual mores of this era, suspects sucking cock isn't in vogue.