Why do boats float?

Because boats are powered Von magical monkeys that are held below-deck.
They use their telekinetic powers to make the boot levitate just high enough above the water to where it appears as if it is floating.

If you've ever heard of the bermuda triangle, that is where boats leave their monkeys, carelessly thinking that they don't need the monkeys. after that, the boot sinks and the monkeys carry it into the sky~

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The density of the water causes the boot to float cuz it's lighter...

-Kat