Rope is made of strings twisted together, strings are made of threads twisted together, threads are made of fibers twisted together, and so on. On the micro scale, fabrics are covered in fuzz from all those teeny tiny twists breaking over time from wear and tear. Your pants are covered in split ends.
Even completely brand new, the fabric is always “damaged” because that’s just how fabric is made.
All those fuzzy frayed fibers are like velcro to each other and will get tangled up by the slightest contact. For a visual example, look up “felting”. The concept is the same, where the air between the fibers is slowly reduced as they tangle tighter and tighter together into little pills.
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