"On the bed." Sherlock said, gently pulling John's hand away from his arse and to his feet. He was much more gently this time, not pushing John, but laying him down on the bed and then turning off all the lights, before pulling out a drawer on the bedside table. He didn't do it often, but once in a while Sherlock had.. urges. So he had some lube for when he did.
"Lay back, put a pillow under your arse. I need to stretch you first, John." the last thing he wanted to do for their first time was hurt the man he cared for.