Uhh… more groping for science?
Merlin is a morning person. There’s nothing like riding Arthur until Arthur passes out from exhaustion to make him all bright eyed and bushy tailed the next day.
Despite Arthur’s best efforts to tire him. And the many sex marathons they have. Seriously, not that Arthur is old or anything (here he ignores all smug croons from Merlin) but where does Merlin get that energy? Is he - (“What’s that word again Merlin? The one that draws strength from the sun?”) “Solar powered!”?
(“For the last time Arthur! I am not an incubus!)
An incubus would explain how a mere human can do that trick with his tongue-
But because Merlin is a morning person, he has the best ways to wake up.
Arthur stirs to kisses along the back of his neck, the puff of hot breath on his ear. A shiver runs down his spine, delight making his toes curl when he feels Merlin stroke his belly in a seemingly mindless manner, betrayed only by how his fingers run tantalisingly up the forming bulge in Arthur’s boxers. Arthur turns his face into the pillows (not to give further access on his neck why would you think that) as though he planned on going back to sleep, but his body itself (well used to the promise of sex simply by Merlin’s close proximity and smell, the Pavlov certainly had a few points there) shifts back against Merlin, until Merlin is plastered against his back.
"Morning," Merlin says casually, as though he isn’t currently petting Arthur’s cock like a well favoured pet. Arthur can just hear the smugness in his voice and absolutely refuses to give him any satisfaction. He grumbles into the pillow.
Not one to be deterred, Merlin simply kisses the skin behind Arthur’s ear, worrying the skin behind it with his teeth and tongue, and Arthur stifles the ensuring moan (not very well, because Arthur can practically feel the little hearts emitting from Merlin with the way he is nuzzling into Arthur and Arthur really can’t complain)
To put a stop to Merlin’s blatant teasing, Arthur arches into Merlin’s touch to get more friction. Because Merlin is a wicked wicked thing, who knows Arthur’s body better than him, Merlin inserts a leg between Arthur’s thighs and firmly grips Arthur through the snug red boxers.
(He should have recognised the all too familar gleam in Merlin’s eyes last night when he saw Arthur in this particular pair.)
Gasping (manfully) Arthur twists his hands into the sheets, loosening them even as his eyes screw shut from pleasure. Merlin practically purrs into his ear, revealing the sex maniac that he truly is inside. “It is a very good morning, isn’t it?” With a practiced ease, he slips a hand into the now too tight pants, and gives Arthur a languid stroke (all hello Arthur junior did you miss me even though we were only one day apart how about we have some fun with Arthur today as well?) as he suckles another mark into Arthur’s neck.
(Merlin is secretly fond of seeing his marks on Arthur’s body, just like he is of wearing Arthur’s)
"Do you know what will make it even better?" An incoherent groan is all the response Arthur can manage right now as Merlin continues to lazily pump him. A potent mix of keeping him interested and very very frustrated. "Do you, Arthur?"
"Y-yeah," Arthur pants, completely gone for Merlin and his devious hand, his hips moving into Merlin’s fist. Freeing his hand from the sheets, Arthur grips Merlin’s so that it’s easier for him to grind back.
“Good,” Merlin says cheerily, plants a wet kiss on Arthur’s ear and proceeds to
tuck Arthur’s erection back into his boxers.
"What, Mer-Merlin!" Arthur splutters, turning to his side and grabbing for him. Ducking out of the way easily, Merlin grins impishly back at him as he leaps off the bed. "Get back here!"
"See you at the pastry shop in five minutes!" Merlin drops his gaze down to angry Arthur junior and positively brightens further. "You can get breakfast and then get dessert.”
"Love you too!" Merlin shouts even as he all but skips out the bedroom, slamming the door. Arthur definitely does not watch the way the tank top Merlin is wearing slips from one shoulder and highlights the curve of his arm. He does not. Arthur is fuming mad, positively boiling and Arthur is-
Arthur is putting on his trousers.
After, Merlin sucks him off, backing Arthur back up against the door and just going for it.
That trick with his tongue?