Haha, Merlin knows that Arthur loves him really because it's impossible not to (Cheekbones! Adorable Irish grin! Wicked eye twinkle!) and Gaius has protected im on more than one ocasion, as has Gwen, because he's adorkable and stuff. There's nothing he can't get away with :)

I think what I love most about Colin Morgan is that his Merlin can't keep a straight face during the humerous bits! And be honest... Gwen wasn't doing a very good job at being serious either ;)