couple of things, juice may run through one's intestines because one might be ingesting much more than one would by chewing, sucking, and spitting out the fibrous, and then stopping when your body has told you that it now tastes bad (the stop). Try it sometime, see how much kale you can chew, suck and spit out. Or with spinach, or dandelion,, etc..
I tend to not do well with avos anymore. Maybe because years past I ate a million of them. I am not sure but they tend to create discomfort with my liver. Original paleo didn't have definitions but he did have instinct. And sometime that instinct walks a fine line so to speak. I think it's highly likely that a 'tribes' elders might be like our parents saying things like all that candy will give you a stomach ache, as in all those avocados will may you feel not so good. We don't always remember what we ate well enough to correlate directly to feelings of well and not so well being. And often our tastes do overwhelm our better judgement. Can't tell you how much better I do without honey, raw wild honey, even though I LOVE the stuff. But then I've abused my body for many years with excesses. And hence my body is probably overly sensitive to sugars where other's are not. hence,, early man with paleo diets being eaten generation after generation I highly suspect would have a much better litmus gauging guide than mine, and ability to eat healthily many foods that I am now sensitive too.
