The point wasn't to drink so Amadeus didn't take much before he was running his tongue over the wounds left behind. The point was to draw it out. So while Ariel might not get as lost as Amadeus himself would have, he knew it was only going to make that frustration and anticipation even worse. Which was why he turned his head and repeated the action by biting into Ariel's other inner thigh as well. He bit a little harder, a little deeper this time, may have even growled a little himself at the continued tastes of Ariel that he kept taking.
A swipe of his tongue and he was closing up those as well. Then Amadeus finally gave in and turned his attention else were. He looked up the length of Ariel's body and meet his gaze before running the flat of his tongue up over him, only to end with swirling it up around the tip. He dragged it out like that a few more times before ending the torturing and swallowing his lover down.