There's a Bum on My Face

I recently had the following conversation with Mikayla...

Mikayla: Mommy, what does a bum look like?
Me: A bum?
Mikayla: Yes, a bum.
Me: You know what a bum looks like. Why are you asking?
Mikayla: Because I want to imagine that there's a bum on my face.
Me: What???????
Mikayla: I want to pretend there is a bum on my face because I'm in the water. I just want to imagine it.
Me: But...a bum?
Mikayla (thinking silently to herself for a moment): Maybe a bun...
Me: A bun? What are you doing in the water?
Mikayla: I want to imagine that I can swim and look at turtles in my Snow White Dress.
Me: Oh, so want to imagine that you are wearing goggles?
Mikayla (laughing at herself): Oh GOGGLES!!! Not a bum. I'm silly sometimes.