Sherlock rifled through his 'toy chest', a footlocker at the end of his bed. He came back a moment later, with a small rubber ring. He kneeled down and pushed it none too gently down to the base of John's cock, then stood back up again.

"There you go, that should keep you from coming. " His face turned deadly serious. "It better keep you from coming. Because if you orgasm before I tell you to.. if I tell you to, if you earn the right to even come, then the punishment will be FAR worse. Do you understand my little cock slut?"