Sherlock actually pulled back in surprise. He hadn't expected that intense of a reaction. "No one.. had ever done that to you, have they?" He asked. "Do you... like it?"

Even though he asked the question, he was already leaning back in before John could answer, licking a strip from his perineum , across his hole, and up the top of his arse, then back down again.

He was sweaty and musky and surprisingly had the slight taste of brimstone.

It was PERFECT.