Good. They roll so they're settled against him properly. And--alright, that tail wag was...cute, they think.

"...could do that?" Frisk can't really make out what little expression he can show from their angle. "Ride sounds fun. But it's nice here right now." Both of those statements are quite true. Running around on a giant skeleton friend would be a great rush, and just lying there next to him, even if he looks incredibly weird and they were just so angry with him, still manages to be soothing.