"Ohhhh... you have no idea...." He drew each word out exquisitely long, like a jaguar growling at its prey. If John thought this mouth was wicked now, Sherlock could show him so much more.

He dipped his head down, taking one of John's balls in his mouth. He rolled his tongue around it, not missing a single millimeter, coating it in his saliva, tasting every ridge and fold and pore. He sucked on it very lightly, just teasingly, before pulling away, and then working on the other one.