The first time Merlin kisses him, completely out of the blue, Arthur is not at all concerned. He just doesn't know what he's in for.

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The first time Merlin kisses him, completely out of the blue, Arthur is not at all concerned. He just doesn't know what he's in for.
Merlin figures out why Arthur manhandles him so much. Arthur himself is a little slower on the uptake.
After everything they’ve been through - all the lives they’ve lived, the battles they’ve fought - this really doesn’t matter all that much.
But it doesn’t help that the first time Arthur sees him this time around, he bursts out laughing.
Gwaine starts courting Merlin, and Arthur turns into a protective mother hen of massive, neurotic, possibly ridiculous proportions.
Arthur is the Royal Arbiter for Suitable Suitors' Disputes. He (and his trusty companion, the golden-dragon-tasselled hat) alone can determine who is fit to woo royal servants and other assorted courtiers in Uther's court. (In light of the sentence above, the following may not appear to be a truthful statement, but: not as cracky as that makes it sound. Really.) This time: Arthur arbitrates a dispute (with heretofore unforeseen wisdom); Merlin observes.
Merlin loses (some) control of his magic, and to his dismay, his magic happily starts doing his chores for him. Bonus points for Arthur walking in to find Merlin frantically shouting at Arthur’s armour to stop cleaning itself (or some other task) and he is horribly appalled, but then starts to like all the little things Merlin’s magic does for him (e.g. tucking him in at night, cutting his meat for him, etc.). Basically, Merlin’s magic is as in love with Arthur as Merlin himself, while Merlin remains furious and in denial.
From the kinkmeme prompt: Arthur/Merlin - drawn to each other in their sleep. For some reason they have to share a bed. They start out on their own side but by morning they always end up in each other's arms.
There are several considerations Arthur would like to go over, starting with the state of Merlin’s virtue.