Dean may want to take a look at the fact Lucifer is an angel for how he's managing. Not that Lucifer is ready to come again yet; right now he's just refusing to let up on Dean.

"How long until you beg to be allowed to come, I wonder," Lucifer says as he maintains his inerrant thrusts against Dean's prostate in an effort to push Dean to that edge he's not allowed to actually fall over without Lucifer's say-so. "Yes, yes, you can't beg out loud, but you can beg in your mind."