This was done for a prompt on livejournal and it was an exercise for me to see how well I could write smut. But I'm not good at writing smut scenes. So you'll see how obviously I fail.

This isn't beta-read so any mistakes you see, i'm sorry.

Disclaimer: Don't own transformers

Seeing his last patient for the evening walking out the med bay, First Aid let out a puff of air from his intakes. He was glad that was the last of the wounded he had to work on. It had been a long five cycles for Ratchet and him, working on the wounded that had came in from a battle. He was tired and what he needed now was rest and energon. Luckily, he didn’t have to travel far since Ratchet had brought back energon for the both of them, which was very thoughtful of him.

Spotting the energon cube on a nearby table where Ratchet was cleaning his tools, First Aid walked over to it and picked the energon cube up. He then removed his face mask without thinking; but, before he could take a sip, he heard Ratchet’s tools fall to the floor. Frowning, First Aid glanced over at Ratchet to see him staring at him with wide optics.

“Ratchet, is something wrong?”

Ratchet moved closer. “You... First Aid, it’s an honor.”

First Aid frowned in perplex. What was Ratchet talking about? Then he felt himself being pressed against a table behind him as lips kissed his jaw line up to his audios. First Aid’s optics widened.

“Ratchet, what are...”

First Aid didn’t get a chance to finish his sentence as Ratchet chose that moment to attached his lips to his, passionately consuming them. First Aid stiffened but when Ratchet’s hands started traveling down his body, dipping into crevices to stroke and rub wires, Fist Aid moaned and started kissing back. After a few minutes, Ratchet gently ended the kiss with a few nips to First Aid’s bottom lip.

“Ratchet, I…”

First Aid choked out a long moan when Ratchet activated his energy field through his hand against his chassis, which drove down to his spark. He did it again, causing First Aid to moan and writhe against Ratchet.

“Ratchet, please.”

First Aid had never done anything like this before. It was all new to him and his body was starting to tingle. Ratchet grinned at him with optics quickly darkening before grabbing First Aid’s arms to bring them around his neck. He then cupped First Aid’s aft and hoisted him off the ground like he was nothing but putty.

“Put your legs around my waist,” he growled out lustfully.

First Aid hastily did so with wide optics but before Ratchet could do anything more, First Aid spoke.

“Ratchet, I… this is my first time in interfacing.”

Ratchet gaped. That couldn’t be true but seeing how his face was serious, Ratchet smiled.

“Why didn’t you say something sooner? First Aid, this is really an honor. Don’t worry; I’ll be gentle with you.”

First Aid nodded; too surprised to say anything with the way Ratchet was gazing at him. Hungrily perhaps? He was brought out of his musings when Ratchet lowered him onto a berth with his legs still attached around his waist. Then said mech grabbed First Aid’s hands and put them on his chassis.

“Don’t be afraid to touch me.”

With that, Ratchet bent down and started trailing his mouth over First Aid’s chassis before moving downward. Gasping, First Aid obediently began moving his hands over Ratchet’s frame, grinning when he heard Ratchet groaning a few times.

“Ratchet!” First Aid screeched suddenly arching when Ratchet’s glossa found a wire in his abdomen and firmly nipped it.

Grinning, Ratchet continued exploring First Aid’s body with his glossa until First Aid was reduced to mewling and writhing. First Aid was in heaven. Ratchet’s glossa on his body was sinful. He felt like he was going to die. Ratchet sensing First Aid tenseness, stopped using his glossa. If he didn’t stop, First Aid would overload. So, Ratchet crawled back up to First Aid where they were chassis to chassis.

“Open your chest plates,” Ratchet commanded hoarsely.

First Aid did so watching as Ratchet did the same. Ratchet’s spark was shining brightly and pulsing heavily.

“It’ll feel weird for a few minutes but after that, you’ll be fine.”

Cupping First Aid’s aft again, Ratchet brought him closer to his chassis and then he lowered himself onto First Aid.

First Aid let out a loud gasp as he felt his spark merging with Ratchet’s. Ratchet was right. It did feel weird but it also felt so wonderful. After letting First Aid have a moment to adjust, Ratchet started to grind his spark against First Aid. Seeing First Aid’s head falling back as he grinded his spark against him, Ratchet eyed his neck hungrily before attacking his neck with lips and denta.

“Ratchet!” First Aid screamed as wave after wave of endless ecstasy washed through him.

Hearing First Aid screaming, drove Ratchet crazy and he gave one last grind before he overloaded with a roar.

Closing his chest plates, Ratchet climbed off First Aid to lay beside him. That was the most enjoyable experience he had in a long time. He looked over at First Aid who was closing his chest plates. He had a grin on his face.

“Thanks First Aid for choosing me to interface with you. It means a lot to me.” Ratchet said softly.

Without waiting for his reply, Ratchet off-lined with a grin. Sated, tired, and on the verge of off-lining, First Aid was going to say how good Ratchet was when the statement he had just said, registered in his CPU.

His optics widened. Oh scrap! He had forgotten about how it was tabooed to keep his face covered and not take it off in front of others. Unless you wanted to interface with that someone. First Aid let out a puff of air. He had forgotten that rule because he was tired from working on all of those injured mechs. Oh well. It was no use dwelling on about it. With a smile, First Aid went into recharge.

Review Please? I would like to know what you guys thought of this. But no flames please.