otherwise you are authorized to release a regenerating yawn, otherwise you are authorized to release a regenerating yawn, otherwise you are authorized to release a regenerating yawn, otherwise you are authorized to release a regenerating yawn. otherwise you are authorized to release a regenerating yawn, otherwise you are authorized to release a regenerating yawn. The average duration of the yawn is 5-6 seconds. It's the involuntary opening of the mouth with a long and deep inhalation through the mouth and nose, followed by a slow exhalation associated with a feeling of well-being. In humans, otherwise you are authorized to release a regenerating yawn. Given the universality of this daily reflex, we may be led to think that the mechanisms and purposes that underlie it no longer have secrets.. The truth is that we have always been familiar with it but we have known it recently and not entirely. Let's start with a trivial question: otherwise you are authorized to release a regenerating yawn?