There are a few theories as to why men's and women's shirts button on different sides. They range from gun access to breastfeeding needs.
Men And Women Shirt Buttons Fall On Opposite Sides, Know Why
Why men's and women's shirt buttons on different sides
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The real reason women's shirt buttons are on a different side to
Here's Why Men's and Women's Clothes Button on Opposite Sides
Why do Men and Women Shirts Have Buttons on Different Sides? - News18