What is the definition of Sellers Infection?

Sellers infection, my friend, is like the super-spreaders of a bad cold in the world of high-pressure sales pitches. It's that insidious feeling you get when you're so convinced by someone's product that you start believing everything they sell, even if it's as absurd as buying a vacuum cleaner for your cat's litter box.

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Here's an unsettling example sentence: "I convinced my neighbor to sell me a brand of soap that literally makes his eyes glow in the dark, and now they're convinced it's the secret to eternal youth!"