Takes a good look at this poster for Disney's Planes: Fire & Rescue.
Let's say we accept the conceit that these aircraft are living, breathing creatures, and their windshields, props and engine cowlings combine to form a simplified face on each.
That said, take a look at the plane in the lower left corner. If it's really a living organism, then what orifice would that fire suppression foam be emerging from?
Yep, I'm twelve years old.