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Not just hotels but houses too. There would be a slot inside the medicine cabinet for disposing razors into the wall. Dude who came up with the idea was probably like, "we'll all be dead from nuclear bombs before any of these fill up or needs to be renovated".
They predate nukes, bro.
Replace "nuclear bombs" with whatever relevant worldwide threat you'd like and the joke should still land for you 👍🏼
Dude who came up with the blades in the wall thing was also clairvoyant. He was just mostly wrong in his clairvoyance, a few details would prove to be true.
The future was repealed in the 1920's I think.
Someone is more likely to get cut from handling those open blades in the trash than a trained construction worker demolishing the wall.
Came to say that. Was very common for a long time.
