Toilets flush in a direction determined by how the water is poured into the bowl. For other vessels the pre-existing motion of the water, the shape of the vessel, and the shape of the drain dominate the direction.
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Oh, The Simpsons lied to me, through animation. I hate when people do that.
There was a great Veritasium video about this.
Not with that attitude
There's a toilet guru?
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