Luffy promptly laughed -- not at her, exactly (though she was pretty funny!), but just in amusement at the whole situation.

"Why're you upset?" he asked once he'd settled down, and he genuinely meant it. "Do I look mad or something?" The pirate paused long enough to drop some napkins over where the drink had been spilled, but he didn't really make an effort to wipe it up.

"Anyway, I like monkeys, so I don't see what the big deal is," Luffy continued. "Plus you didn't really call me one to begin with -- you were just asking why I didn't look like a monkey, right?"

This girl was kinda confusing, but maybe she'd stop crying once she realized there wasn't anything to be upset about.