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Yes, we don't harm them or else we would get cursed. It's an old belief and I doubt many still believe in such today but me and my family still believes in it though. Also who would want to harm such beautiful creatures. One has to be very evil to harm them, not only are they beautiful but they are also helpful to make more plants through pollination. While I do hate the caterpillars for eating the leaves of my plants, I just let it be coz at the end of the day when it grows up it will help my plants bear more fruits 😁

Oh yes, we should never harm any pollinator.
Well I am glad your family still believes it, it is a great thing and a comforting thought as well!