"So one of my tasks at work is to refill toilet paper in the bathrooms. Very dull. But I got to wondering if people had a preference to which way the roll was on the holder and decided to run my own experiment. After refilling a side by side dispenser, I loaded 1 roll going over and 1 under. Replaced at the same time. Waited a couple days and discovered the over side was almost gone and the under side was hardly touched. I replaced the over and continued to wait. A couple days later the under roll had been used but still the over was going faster than the under. I went through 3 over rolls before the under roll needed to be replaced.
Redid the experiment replacing both rolls at the same time and swapping which side the over and under was on.....this time the over roll was replaced 2 times before the under needed to be changed out....."
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