[If he knows how suspicious that sounds, why is he even asking?? Arthur stares at him incredulously, hands staying right where they are.]

If you think I’m going to fall for a trick like that when you’re looking so expectant, you obviously don’t know me very well.

[Arthur gives Merlin a challenging look.] Why don’t I wear the damned thing and you try to grab me, if you’re so eager to demonstrate.