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Isn't it weird that we have exactly five fingers and five toes on each hand and foot.
(lemmy.dbzer0.com)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.
Having any fingers at all is a genetic mutation, thats how evolution works, it mutates, and if the mutation works well enough, it gets passed on.