Doesn't always work though. I grew up in the countryside and similar to you I ate dirt, wild fruit (best ever was a egg plum tree we found, though the natural l

Doesn't always work though. I grew up in the countryside and similar to you I ate dirt, wild fruit (best ever was a egg plum tree we found, though the natural laxative effect was unwelcome), drank from streams etc etc. Unfortunately, I developed an allergy to dogs, despite living with one for nearly 10 years! I left for literally 3 months and upon my return I was allergic. Also I still get colds and illnesses like most people (not regularly but I get them) so it's not conferred any super powers in that respect either. That might be because I have my own kids now as kids seem to take their disease spreading role seriously!! So, I'm sure that there are big benefits to our respective early lifestyles but they're not a panacea unfortunately.