Watson moaned a little; he couldn't help it. He drew back, breathing deeply, before taking the head of Holmes's cock into his mouth, very gently. This was proving to be an interesting, unique sort of experience, a deeply satisfying one even if it wasn't typical of their interludes.

He ran a thumb down Holmes's length, following it with his lips. He didn't bother trying to find a rhythm, merely letting himself explore with mouth and fingers in whatever pattern occurred to him, It was definitely worshipful, and beautiful. For all that some might find this sort of thing demeaning, Watson had a hard time finding it so, not when he could hear Holmes groan lik that and know he was responsible.