Cotton
The white thread in your towel comes from cotton. We use cotton to make lots of things, like clothes and bedsheets. But white towels are always made from soft, fluffy cotton.
Imagine shoving your face into a nice, clean, white cotton towel. Mmm, so fresh.
めん
わた
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This cotton is made by men (めん).
Picture all of the men lined up, making towels out of pure white cotton. They're all rubbing their faces in the soft cotton whenever they can.