Arthur groaned loudly, hips thrusting up desperately. He'd never felt like this before, never. It was rough and sharp and Arthur wanted more, never wanted it to end. He couldn't believe it was Merlin doing this to him, though he knew without a shadow of a doubt only Merlin could make him feel this good. He gasped out his name with every jerk of his hips, his legs squeezing his waist tightly.