At first glance, putting aluminum foil under the bed sounds irrational. There is no scientific evidence that a thin sheet of metal can block bad dreams, negative energy, or invisible threats during sleep. And yet, many people who try it report something interesting: they feel calmer, safer, and sleep better.
Psychology offers a clear explanation for why this happens—and it has very little to do with aluminum foil itself.
The Human Need for Control
One of the strongest drivers of human behavior is the need to feel in control, especially in situations where we are physically vulnerable. Sleep is one of those moments. When we lie in bed, our awareness fades, our defenses drop, and the brain becomes more sensitive to uncertainty.
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