[majormajor]

If I asked you that question would you visualize a tennis ball next to a keyhole?

I would not. I'd answer based on what (to the best of my understanding of my own thought process) is something more like a rough tagging and comparison of "tennis balls are roughly this big" "keyholes are roughly this big" -> "the one is too big to fit."

Similarly with something like comparing an elephant to a train. I'm not picturing the two next to each other, I'm trying to remember roughly how big each is.

[postalrat]

Yes, I would visualize a tennis ball near a keyhole.

Another question might be why does a key fit in keyhole and a penny doesn't? A key is bigger than a penny.

Or how did this tree do that damage? https://miro.medium.com/max/738/0*V3lJsXAHSDxqXgxf.jpg