It is unlucky for a feng shui master to sit on other people's clothes when he has his period.

Orthodox geomantic omen is mostly based on the comprehensive calculation of people's living or working environment (orientation, direction), numerology data, time, etc., and draws the conclusion that good luck is different.

What you said has nothing to do with the data mentioned above. It can't be said that although Feng Shui is a problem, it is at most a custom, and the customs and habits will vary from place to place, and there is no unified answer.

If it is not a custom, it is superstition or conformity.