Every job is its own weird little universe, with its own set of unbreakable rules and unspoken truths. It's the "common knowledge" that professionals learn on day one that the rest of us are completely, blissfully unaware of. It’s the secret menu of every single industry.

An online community threw open the doors and asked people from all walks of life to share one of these secrets. The responses are a mind-blowing peek behind the curtain, revealing the things we were never supposed to know about our food, our health, and even our pets. Prepare to look at some jobs in a totally different way.

Discover more in 43 Insider Secrets From Various Jobs That You're Not Supposed To Know, But Are Industry Standards

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