Oh, so John liked the hair pulling? Sherlock made a mental note of that. He wasn't particularly into pain, but a little hair pulling could be fun. And even more so when the other person enjoyed it as well.

His eyes went wide. Good God above, the man was able to get all of him down his throat, every single centimeter. He only hovered there a moment before John pulled back but those few moments, being totally enveloped in wet warmth, it was like nothing he had ever felt before.

"John..." He almost whimpered.. He wanted to come down John's throat, but he also wanted to take John from behind and pound into him. Different parts of his brain (and groin) were warring as to what to do.

"I need you." He said simply.