Eric resists the urge to sigh. Because while fangbangers, though delicious and handy alternatives to crappy synthetic blood, could be and often were dreadfully annoying. Like throwing themselves at a vampire.

"Depends on what you aim to be," he replies, crossing his arms and doing a little leaning of his own. He may or may not be giving her that patented Eric sexy-smirk. "So what are you. A trick, or a treat?"

Yes, he is playing along with this whole thing. Looks like 'pissing off Buffy' outweighs any other option.