Sherlock shivered. He could have as big of a cock as John wanted. But he had to guess how much John could take without it being too much.. He adjusted himself just a bit, guessing that the size that he was now would be big but not too big. At least he hoped.

"And you want to find out, don't you?" He replied, his voice dropping to a low, rumbling timbre without Sherlock even thinking about it.

Oh, by the gods, this ride was insufferably long.