I’m bored as hell at work, so you get porn brainstorms.
John blindfolded with Sherlock’s scarf and then undressed. He can feel the air against his skin, but he can’t tell if anybody can see him, naked with Sherlock’s fully-clothed body pressing up behind him while Sherlock pushes his cock in. John can’t stop the turned-on, worried noises that keep coming out of his mouth.