Most sane people probably would have been made nervous by that show of so many teeth. They would have worried about what they could do to them. Amadeus was not most sane people. It had the opposite effect on him. He craved what all those teeth could do to him. Especially when Ariel was in this kind of mood.
Hitting the pillows, Amadeus stayed where he landed, though he did prop himself up on his elbows so that he could continue looking at Ariel. "Oh baby, you know I'd never use my magic on you," he all but purred out. Because indeed, they both knew that he wouldn't need to. At least not directly. He may use it to shut a door or block Ariel's way, but if he had to go over him, Amadeus would drag him back physically. He wasn't so sure the bedroom would survive it if that ever happened.