He clenched tight and hot around Arthur's fingers as he felt a surge of molten pressure in his lower abdomen, pre trickling down his shaft. He tried to scrabble for purchase but he kept slipping away from any coherent thought, his mind singularly fixated on Arthur's attention to his back door.

"You had best - "

And he gasped, head thrown back as Arthur seemed to find just the spot.

"- hurry. Unless you only want to use your fingers."