Vash raises a hand--and waves it at her with a bit of a 'don't worry, don't worry!!' motion.

"Hey, noone really needs anything like this sort of thing. It's fun, though, right? So just let yourself be treated!"

He insists, he insists!!

...if he had a tail, it'd be seriously wagging. He's definitely already having a great time, here.
He's gonna' stop and look at some figurines so...