Three times a day is certainly not a hard rule - its just a habit.<p>During busy times at work, I can get down to once every other day. Its not hard. Its all about being distracted from hunger long enough to put it in the background.<p>As for how often we &#x27;need&#x27; to eat, that&#x27;s not clear. Three times a day is absolutely a made-up number. Cultural, not biological. And of course how many snack all day long? How many &#x27;meals&#x27; is that?