"You really don't want a bleeding arse, do you?" He asked, giving one butt cheek a nice little slap, and enjoying watching the tiny ripple of the fat under the skin. John was quite fit, so there wasn't a lot of extra fat on him, except for his slightly softness around the middle, but his arse had just the right about of shape to it, nice to hold and slap but not too much.

Sherlock shook his head. He couldn't get caught up on the man's arse and forget the fun that was to come. He lubed up his middle finger very well and pressed against the hole, feeling the first ring of muscle clenching against him.

"You have to relax, John, or else I wont get a finger in, much less my whole cock."