There are some activities that one cannot but undertake, but that he must make sure that the outer society ignores all about. Of those secret actions, the outer society, that includes all sentient creatures alive besides him, not only must not take notice ; but in ideal, it should rest assured that none of its members ever undertakes them. Even though each and every one of them sins in secret many times a day. Including the most eminent enforcers of the establishment of said society. I'm speaking, of course, of the action of burping and farting.