"Throwing Spaghetti against the wall?"?

Does anyone know the origin of this practice and/or phrase. From what I gather, it is a common phrase that is metaphorical. "Throw spaghetti on the wall to see what sticks" / "or how much of it sticks" - I've seen it applied to a rule of thought; as in, throw out a bunch of ideas and see... show more Does anyone know the origin of this practice and/or phrase. From what I gather, it is a common phrase that is metaphorical. "Throw spaghetti on the wall to see what sticks" / "or how much of it sticks" - I've seen it applied to a rule of thought; as in, throw out a bunch of ideas and see what leaves a lasting impression or stands out on top.

But I would love to know a background of this.

Did it start off as a metaphore or did the metaphore mimic a real or common practice?
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