"AHHHH!!!!" Sherlock cried out at the slap. Between the stinging pain of the slap and the quick movement of the dildo in and out, he was honestly surprise that he didn't come right there and then.

Of course John teasing him further was just making it worse.

"JOhhhhnnnnn...." He whimpered loudly, not even caring that he sounded desperate and pathetic. He needed to will this horrible hard on away.. or he needed to get rid of it another way, though there really wasn't time for that, sadly.