This might be 100% bullshit but an interesting theory nonetheless.
Gorliias, chimpanzees and bonobos walk around at butt height and see how strong a potential partner is by their butts. Since we started walking upright boobs are closer to eye level and have eveloved to resemble butts.
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I’m not an expert but an oversized pump will cause more starts/stops which will reduce the lifespan of the compressor.
Maybe it’s a hot water tank? They can often look fridge-like however I’ve never seen one like that.
Never heard of prison school