[He's half-monitoring the situation. If he couldn't feel and appreciate every pass through the feathers, he might not care much, but as it is, the further Vash's hands wander inwards, the more his wings start to twitch involuntarily. It's not bad enough so far to warrant a warning. It tickles, right about now. So it's fine.

This will not cause problems later.]

Oh, I'll certainly never let you get lonely. [He begins, with a surprising amount of self-awareness in his tone for once. This will never happen again.] I don't like being alone much myself. Birds are social creatures, you know. Imagine if you had picked something more aloof like a snake. I'd like to think I'm much more fun and loveable than—

[And then, whoops, Vash's hands wander just a bit too close, and Ain stiffens and lets out a strained, shaky exhale. It's fine, he's fine.]

—than a snake. [He concludes after a moment.] Haha, Mr. Plant... Unless you want to get pounced on, you might want to watch where your hands go.

[There's a very pointed look over his shoulder at that. If Vash isn't a good Christian boy no more, he might figure out what it means.]