[If it's strange, Mettaton doesn't show it. Instead, he gently nuzzles back, a quiet shudder passing through him. When he speaks, his voice sounds quiet and vulnerable. There's no more pretense.]

I'm tired of pretending. I am scared. If nothing is going to feel alright, then at least we can admit what we need to feel.

[So yes. They can be scared together. Even if it isn't helpful, it's at least honest.]