The summer I turned thirteen, my best friend and I spent most of July on her garage roof with a bottle of baby oil, a reflector made from a cereal box lined in foil, and one shared Walkman. Her mother looked up at us once, said “don’t fall off,” and went back inside.
That was the extent of the supervision. The beauty advice came from the same place everything else came from: older sisters, Seventeen magazine, the girl at the pool who seemed to know things, and whatever our mothers had been told by their mothers.
Gen X girls grew up in households that expected them to figure most things out on their own, and that included their faces and their hair. Nobody fact-checked the rules. They were repeated often enough that they hardened into truth.
A lot of us are still following them, decades later, without ever having checked whether they were right.
1. A base tan doesn’t protect you from burning
The logic seemed airtight. Get a little color before the beach trip and you won’t burn when you get there. So you lay out in the backyard in May, with the baby oil and the foil, building your base.
Harvard Health estimates that a base tan is roughly equivalent to an SPF of 3 to 4, and that a tan itself is a sign of skin damage, not protection from it.
So every May you were spending a week or two acquiring the sun-protection equivalent of a thin t-shirt, at the cost of a week or two of unprotected exposure.
The women who built the most bases are now the women with the most spots to get checked. The tan faded every September. The damage stayed.
2. If a product stings, it’s not working harder
You remember the burn of astringent on a cotton ball. Sea Breeze, Ten-O-Six, witch hazel, anything with enough alcohol to make your eyes water from across the bathroom. You took the sting as proof the product was serious.
What you were feeling was your skin’s protective barrier being stripped, twice a day, on purpose.
Dermatologists now generally advise against harsh, alcohol-heavy astringents for exactly this reason. Stripped skin often produces more oil to compensate, which sent plenty of teenage girls back to the bottle for another round, convinced they needed something stronger.
The gentle routine you’d have dismissed as lazy at fifteen would have kept your skin calm. Instead, the harsh stuff went on the list of everyday habits that quietly age skin faster.
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3. Oily skin still needs moisturizer
If your face was shiny by noon, the rule was simple: skip the moisturizer. Why add more to a face that was already producing plenty?
You skipped it for years. Through high school, through your twenties, maybe through last week.
Oil and hydration are two different things, and a face can be short on one while overflowing with the other.
Dermatologists have spent the last decade or so explaining to patients that oily skin still needs a lightweight, non-comedogenic moisturizer, because skin that lacks water tends to respond by making more oil.
Women who finally added a gel moisturizer in their forties tend to describe the same surprise: the shine calmed down within a few weeks. Decades of avoidance had been feeding the problem.
4. Shaving doesn’t make hair grow back thicker or darker
This one came with a warning attached. Shave your legs too early and you’ll regret it, because the hair comes back thicker, darker, and coarser, and then you’re stuck shaving forever.
Shaving cuts the hair at the surface and has no effect on the follicle underneath, which is where growth, thickness, and color are determined. Freshly cut hair has a blunt end instead of a tapered one, so it feels coarser and can look darker against the skin until it grows out. That is the illusion, and it fooled several generations of mothers.
Girls delayed shaving, hid their legs under tights in gym class, and worried about a consequence that was never going to arrive.
5. Hair does not need 100 brush strokes a night
Marcia Brady did it on television. Your grandmother did it at her vanity. You did it in front of the mirror, counting under your breath, because that was how you got shiny hair.
The American Academy of Dermatology lists excessive brushing among habits that harm hair and states plainly that hair never needs 100 brush strokes a day; the organization recommends brushing only to style and removing tangles gently.
Brushing is friction. A hundred passes of friction every night, on hair that had already been blow-dried, hot-rolled, and sprayed into place, produced split ends and breakage. Whatever shine you had came from the strands you managed to leave alone.
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6. Trimming your hair doesn’t make it grow faster
You wanted long hair, so you went to the salon every six weeks to “get the ends trimmed so it’ll grow.” The stylist agreed. Your mother agreed. The hair hovered around your shoulders for three years and nobody questioned why.
Hair grows from the follicle in the scalp. What happens at the ends has no influence on how fast new hair is produced. Cut half an inch every six weeks while your hair grows roughly half an inch a month, and you have found a very reliable way to stay exactly where you are.
Trims do serve a purpose. They remove split ends before they travel up the shaft and cause breakage, which can make hair look fuller and healthier. The growth itself happens whether you cut it or not.
7. Cold water doesn’t close your pores
Steam to open them. Scrub. Then a splash of cold water to close them back up, so nothing gets in. It was practically a ritual, and it felt like it was doing something.
Pores have no muscles, so they can neither open nor close. Heat can loosen oil and leave skin looking flushed, and cold can tighten the surface for a few minutes, but pore size comes down to genetics and how much oil is sitting inside them. Water temperature never enters into it.
The ritual did no real harm. It just never did what you were told it did, and plenty of women are still finishing every face wash with an ice-cold rinse in the belief that they’re sealing something shut.
8. Toothpaste doesn’t belong on a pimple
You woke up with a spot on your chin the morning of something important, and someone, a friend or a magazine or an older cousin, told you to dab toothpaste on it overnight. It would dry it right out.
Toothpaste contains ingredients meant for teeth, including flavorings, detergents, and whitening agents, that can irritate facial skin. The usual result was a red, flaky patch of irritation sitting on top of the original blemish, which was now harder to cover and slower to heal.
Benzoyl peroxide and salicylic acid were available in drugstores the whole time. The toothpaste trick persisted anyway, because it was free, it was already in the bathroom, and the girl who told you about it swore it worked.
