Waddle Doo: So, Dee.

Waddle Dee: Hm?

Waddle Doo: Why do you think Waddle Dees and Waddle Doos don't have visible mouths? Seriously, what's the evolutionary gain?

Waddle Dee: But we do have mouths!

Waddle Doo: Yeah, I know. But I've heard Waddle Dees were an alien species that arrived on Dreamland several million years ago. I guess that explains why they've been seen on other planets?