One day, Fionna walked to Princess Bubblegum with the two ears burning.
Bonnibel: What happened to your ears?
Fionna: Well, when I was ignoring my work suit the phone rang and I mistakably picked up the iron instead of the phone!
Bonnibel: Well, that explains one ear! But what about the other?
Fionna: Fionnari called again!
Bonnibel: How is that possible?
Fionna: If you had someone how loves you and you don't even like him! You'll be your ear burning! Just don't think about-
Bonnibel: AAAAHHH! MY EAR IS BURNING!