Proper toilet paper installation

The most popular method has quickly become the empty cardboard tube on the dispenser with the new roll of toilet paper on the countertop.

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There has been a raging debate since the invention of toilet paper. How do you install the roll? Is it over or under? There should be no debate, the inventor clearly designed it to work a certain way as illustrated in the photo. However, when you go to someone's house and use the bathroom, whichever way the toilet paper is installed, switch it to the other direction.