Bloody palms

"Never mind. Okay.. Just unbutton your pants, sit down and wrap your hand around your dick, moving it up and down."

   [ He nods, not even caring about how crude Dean was being about it, this didn't seem like anything out of the ordinary to Cas. He sat down on the edge of the bed and zipped his pants down, wiggling his hips slightly to make the jeans hit the ground and pool at his ankles. He does the same for his briefs, releasing his straining hard-on. Wrapping a hand around it, he keeps eye contact with Dean as he moves his hand up and down. ]

"No… I’m just surprised. I didn’t think-" He crossed his arms. "I just didn’t know you felt like that towards- Umm.. Well me."

Dean’s eyelids flew open and he turned to look at him, shock on his face. “Cas… You’re picturing me?”

Dean’s eyes widen and he turns around, clearing his throat. “Yep. Just close your eyes and imagine it happening. Talk me through what your thinking.” He told him, rubbing his eyes.

   [ Castiel closed his eyes and continued to visualise that what was giving him an erection. ]

                   "I'm picturing you pleasuring yourself."

Dean ran a hand through his hair before sitting. “Well, first, you’ve got to… Get it up. So you think of something that turns you on..”

   [ He gives Dean a confused look but then nods, and soon the bulge in his pants grows slowly. ] 

"well… How do you want me to help you?"