A/N: Yo! So it's currently 5:24am and I was inspired so.. :) Can you blame me? Best couple EVER. I will emphasise the EVER again. :') I love these two. Hot men and beautiful smut makes me a happy person. It's not really a smutty chapter but it's definitely sexayy :') My perverted mind has come to say hello once more.

I don't own this shit blah blah :D 3 3 :D - MadameSnooooooow. Please review for me. Cos I'm greaaat.

Mark was hurting. Not all that emotional crap that people talk about and he wasn't injured. No, Mark Sloan was sexually injured. His plan to 'turn over a new leaf' wasn't going so well. He was refusing himself sex of any kind to prove to Derek that he could do it because he didn't believe him. He hadn't had sex in... forever and it was causing Mark serious problems at home, at work and everywhere else. Mark was stubborn so he refused to 'do it himself', that and he couldn't be bothered.

"Mark! Hey." Derek slapped his friend on the back.

"Dr. Shepherd." He greeted.

"What? I'm so much of a villain for you not having a lot of sex with a lot of the nurses that I don't even get called by my first name? That's cold." Derek chuckled.

"Shut up." Mark warned.

"How sweet," Mark glared at Derek. He knew exactly how to push his buttons. "Anyway, I came to ask you if you'd observe a surgery that I'm doing today."

"That's insulting."

"Why is it?" Derek grinned.

"Well because we're both attendings. That, my friend, is how you talk to a resident or an intern." Mark grinned back.

"Do you want to watch or not?" Derek asked.

"I don't even get to scrub in? I'm the best." Mark was still smirking.

"No, I'm the best. The surgery is at noon. Be there." Derek stroked his arm as he walked away, momentarily freezing Mark. He concentrated hard on thinking of deeply disturbing things that would cause his 'problem' to go away for a while.

"It's just because of the lack of sex, you are not gay." Mark muttered to himself as he grabbed his patients' files and walked away. Thank god his scrub pants were baggy.

Mark was stood in the OR. He'd had consistent hard on for about 20 minutes now and it was getting ridiculous. Watching Derek scrubbing in out of the corner of his eye was certainly not helping. He concentrated on his facial expression, seeing him smile one last time before that evil mask covered up his amazing smile.

Derek walked in holding up his hands, waiting for the towels and operating gown. He received a few "Good afternoon Dr. Shepherd"'s from the interns and nurses and then he turned to Mark and said.

"I hope you'll enjoy yourself Dr. Sloan." then he turned around quickly but in the process, his hand caught onto something briefly that made Mark squeeze his eyes tight shut for a few seconds attempting, but failing to compose himself.

"Okay everybody. It's a beautiful day to save lives. Let's have some fun." Derek said to the OR and he began asking for various instruments to cut open this man's head.

During the process, Mark was noticing that at each chance he could get, Derek would turn and make eyes at the man next to him. Everytime he did it, Mark would do it back and get a throbbing in his erection, straining against his boxers. This no sex thing might be a bigger problem than he thought. He was glad Derek and the unconscious man were covering his waist otherwise he'd have had a humiliating situation on his hands and he'd never live it down.

Then Derek put his hands down, apparently observing, and with his one clean gloved hand, he slyly grabbed Mark's balls and squeezed a couple of times before resuming the operation. Nobody in the whole OR noticed, nobody was in the gallery and they were in a blind spot to all of the cameras but there was one person that noticed and that was Mark. He gasped and then turned it into a slight cough so that people weren't suspicious.

"Dr. Sloan, could you please try not to cough into my patients brain?" Derek said and the crinkled on the corner of his eyes gave away to Mark that he was smirking.

"I'm wearing a mask, I'm sure he'll be fine." He stated simply, nobody but Derek hearing the wobble in his voice. His eyes met Mark's and Mark's guts burned. His eyes were so... meaningful and deep. He mentally slapped himself for thinking such gay things.

"Hmm..." Derek was pondering again. Mark's breath caught in his throat and he turned away, as if to be looking at something behind him. He felt Derek's hand discreetly, but fully, grab his length and rub up slowly once. Mark was certainly not prepared for what happened next. The familiar aching in his balls. He hadn't had an orgasm in about a month and for a sex addict, that was dangerous territory. Derek rubbed his erection another time and another time, still nobody noticing, and Mark couldn't take it anymore and he literally exploded. He doubled over and clutched him stomach, groaning in what sounded like agony but was absolute, pure pleasure.

"Holy shit!" He gasped out, running out the OR, thankful for the operating gown covering him. Everybody looked at him in shock and as he was leaving, he faintly heard Derek yell:

"This is why we don't come into work hungover, Mark!" Mark stumbled into the nearest on-call room and flopped onto the sofa, gasping and groaning as he finished cumming and let out his last shudder. He couldn't believe he actually jizzed his pants. He felt like he had never ejaculated that much in his entire life! He opened his eyes, his head buzzing and saw Meredith Grey on the top bunk of one of the beds looking at him in shock.

"Don't you fucking judge me. I haven't had sex in over a month, it was bound to happen sooner or later." He panted looking at her.

"Alright. You okay? You err... you want me to leave?" She asked.

"Can you go and get me some more scrub pants? Mine are quite obviously a mess." He smirked, still breathing heavily.

"Sure thing."

"Oh hey, and Grey?"

"Yeah?"

"I understand you'll tell your silly friends but I'd really appreciate it if you only told Yang and Stevens. Respect a man's wishes and all that." He grinned again.

"Sure." Meredith went out of the room, leaving Mark to buzz in the aftermath of his most amazing orgasm to date... and who gave it to him.