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All cars are driverless cars when they're parked.
(lemmy.blahaj.zone)
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.
How come cars drive on parkways but park on driveways?