A lot of these questions are ones that I've often asked myself about him because HE MAKES NO SENSE. As a biology student, I may have included a lot of revision for my mocks by doing this little piece (Who says that fanfiction can't be educational?) But anyway. Hope you enjoy, and as always please like, comment and review!

"Genos?"

The blonde cyborg looked up at the young girl, sitting across the table from him. Her notepad was open in her lap, a pen poised above it. Inwardly, he sighed. He couldn't believe that Sensei had actually let her stay in the flat with them. "(Y/N)-san."

She frowned slightly, her nose crinkling up in annoyance, and huffed, pointing the tip of the pen at him. "You make no sense whatsoever, you know that?"

"I do not understand your statement," he said bluntly, pointedly looking back down at his book. But the female wouldn't stop pestering him, and irritation began to worm its way into his brain.

"Your physiology! Your materials! They make no sense!" You threw the pen down onto the table, tracing your index along the lines of your writing as you spoke, brow furrowed. "You have no oesophagus, no stomach even, but you still eat! You're made of metal, so there should according to my calculations be no room for all of your organs! You got blown half to bits by that freaky fish guy-"

"The sea king," he corrected her. She waved a hand in his direction, her lip curling in disgust.

"Yeah, whatever. But you should have died! Nothing should be able to withstand that much damage to a vital area of the human anatomy and get away with it! And speaking of anatomy," she stabbed the page and glared up at him, "There is no material on earth that can replicate human skin and yet still act as a ceramic armour the way your face does!" She snapped the book shut and slammed it onto the table, pointing at him.

"You're a... an anomaly, a paradox, a riddle with no straightforward answer! And it's so ANNOYING!"

Genos was perturbed by the actions of his companion, and less than surprised. After all, she had been pestering him about his physiology ever since she had arrived on Sensei's doorstep, three weeks ago. His hearing detected a slight change in her pulse, and he deemed it fit to speak. "Why do you want to know all of this, (Y/N)-san? I am sure that there are many websites to explain the phenomenon of my physical make – up."

"I want to know how you can feel." She leaned forward and rested her chin in her hand, staring at him intensely. It made him... uncomfortable? Self-aware? There was no word in his dictionary for it. Or his thesaurus. Or, indeed, any number of books that he had programmed to be stored in his brain. "How do your sense – receptors work, without any stimuli?" She reached out and tapped his arm. "If I do this –" His metallic arm dinked under her nail – "Are you even aware of it, without sense receptors? Can you sense that

-" She squeezed his wrist – "Does the message travel to your brain along wires, or is there a special electric current used to mimic sensory and motor neurons?"

"A very slight electric current travels through my metallic parts," he admitted, pulling his arm away from the girl's reach. Her touch had... had disturbed him in some way, as though it was a much stronger electrical impulse being sent through his entire body. It unnerved him. "But you forget that I still have nervous cells. Cyborg does not mean fully robot."

"But then how do you describe this?" She shuffled around the low table and tugged at his face, cupping it to yank it this way and that, inspecting it before Genos jerked himself away, flinching in shock and surprise, stunned that she had even dared to reach out to him like that. How rude! But also how – his stomach region seemed to be filling with a sensation not unlike a hot liquid, slowly making its way downwards – strangely thrilling it had seemed, like – like –

Genos gave up. "I must insist that you do not touch me like that again," he said stiffly. Even if he could still feel her soft hand on his cheek.

You just humphed and crossed your arms, flicking your hair out of the way of your eyes impatiently. "It's unlike anything that exists. I can't believe that that's manmade. I refuse to believe it!" She pouted for a bit, but then her eyes deepened slightly, a small frown line appearing over her eyebrows. "Can you even feel anything on your face? I mean, you flinched when I touched it..."

Genos looked away, his expression outwardly unreadable as he promptly stood up and moved away from her. Inwardly, his emotions were boiling over, nerves, fear, annoyance, incomprehension and many, many others. How could he describe to her the sensation that her hands had left on his cold, shiny steel arms, or the feathery prickling that was still fading down along his synthetic jaw, when he himself could not find the words?

Which is why when his Sensei came in with the shopping, Genos rushed to help him prepare a meal, purposefully throwing himself into his tasks without a care. After all, he was a nineteen-year-old cyborg, and she was... she was...

You watched Genos without him noticing, eyes widening as you covered your mouth with your hands before looking away, blushing. You could describe all of your emotions, even if he couldn't describe his own.

"Sensei?"

"Hmm?" Saitama was lounging on the floor, watching the tv, but looked up at his disciple who was sitting rigidly with his legs crossed and (Y/N)'s notebook in his lap.

"What's up, Genos-kun?" The girl had gone to bed in the room next to them a while ago, complaining that she was sleepy.

Genos looked uncomfortable, staring down at the page on his lap. "If I call out some words which describe an emotion, would you be able to put a name to them?"

Saitama sat up and stretched, yawning. "I guess I could try..."

"The first sentence: An uncomfortable self-awareness around another person, which heightens as they look at you."

The One Punch Man looked bewildered. "Uhh, maybe go onto the next one..."

"The second sentence: A touch which disturbs, but thrills at the same time, and lingers."

Saitama's face was blank. Genos sighed, and went onto the last conflicting emotion.

"The final sentence: A desire to be around a certain person, at the same time opposed by guilt." He looked up. "Sensei?"

"Genos-kun," Saitama said, slowly, "Would you say that you like (Y/N)-san a lot?"

"I cannot entirely describe my emotions towards her," the cyborg admitted. Saitama's face lit up in a knowing grin, and he nudged Genos with his elbow.

"I think I know the emotion that you're looking for, and it's called lovestruck." He laughed at Genos's dumbstruck face and lay down again, smiling. "Who would have thought it? Seems she has quite the thing for you, as well," he added, peering into the open page on Genos's lap. "Ohh, possibly there could be something between the two of you... Best to leave it for tonight, Genos-kun. Come on, you still need to eat your udon."

Genos looked at the drawing of him one more time, and read the inscription beneath:

Genos is very difficult to draw correctly – so many metal parts! I wonder if he can feel – would he feel the same way about me if he could? – Maybe confront him about his components soon and find out- Love? Nothing? Idk.

"Lovestruck," he mumbled. He snapped the book shut and placed it in the exact same position that he had found it in, correct to the nearest degree. Then he ate his udon.

Haah. Saitama is hard to write for. You know in the sub how he goes "Ohhhh" in understanding, surprise etc.? How do you write for that?