A/N: I know a lot of people will be writing fics about Arthur having to adjust to modern times, but I thought it would be fun to write about it. I'll probably write a series of one shots, each one about Arthur discovering a new modern invention.

I hope this is okay! :)

"Arthur, this is ridiculous-"

"I'm not wearing it!" said Arthur petulantly. "Imagine how I'd look! I mean, I would look like you!" He cast a disapproving eye over Merlin's jeans and T-shirt, shaking his head in disgust.

"But Arthur, things have moved on from a thousand years ago!" Merlin protested. "Trust me, if you walk around wearing your armour, everyone would laugh at you."

"But it's so ugly!"

"It's not, it's normal to wear this now!" said Merlin with a sigh. "Come on, it makes sense for you to wear them."

"Why?" said Arthur at once. "Give me three good reasons why I should wear them."

"One, everyone will laugh at you if you walk around in armour. Two, you'll embarrass yourself and I'm pretty sure you don't want that. Three, you already look like an idiot, so they won't make you look any more of a prat than you already are."

Arthur scowled. "The third reason is just rude, Merlin. Plus, you told me the first reason a few minutes ago, so technically that doesn't count. And don't be rude to the King," he added.

"For the last time Arthur, you are not the King any longer!"

Arthur ignored this. "Fine, if it will stop you moaning at me, I'll wear them," he said grudgingly. "What are they called, anyway?"

"These are called jeans," said Merlin brightly. "And this is called a hoodie."

"A hoodie?"

"They're very comfy, you'll like it," said Merlin, beaming at him.

"Right," Arthur sighed. "Great." He left the room to change into them, holding them as far away from them as he could as though they were going to contaminate him.

Five minutes later, he was back. Merlin couldn't help smiling fondly at the glum expression on his face.

"I look stupid, don't I?" said Arthur morosely.

"The jeans are on the wrong way round," said Merlin kindly. "But overall, you look much better than before. You look normal."

"Do I?" said Arthur anxiously.

Merlin nodded. "They suit you. And they are comfortable, aren't they?"

"No!" said Arthur at once. "They're horrible, especially this hood thing." He looked down at the hoodie in disgust. "I mean, what's the point of this thing? Very impractical, especially when you think about the things we used to wear, Merlin! Now I'm off to fix these stupid trousers."

From then on, Arthur would always wear jeans and a hoodie, although he continued to maintain that he hated them with a passion and only wore them because he had to. Exactly how every single one of Merlin hoodie's had found their way to Arthur's wardrobe one night, however, was still a mystery.

A/N: I'll appreciate reviews! :D