I have been reading a lot of material lately about the effect of our microbiome on the body & mind. The microbiome is the collection of single-celled microorganisms throughout our living tissues.
In fact, the number of bacterial cells far outweighs the number of actual human cells. Physically, we are a biological vehicle for genes & also for other organisms.
We mostly live in a positive symbiosis with these tiny creatures living throughout our body.
I've long suspected that these microorganisms have had a greater effect on us than we'd like to admit.
Now, it's being discovered that gut microbes affect our eating habits, and even our psychology.
Even the act of intimate kissing is an exchange of billions of bacteria.
This is why, despite liking cleanliness, I'm not really a germaphobe. I feel that we are surrounded by and infused with microorganisms, so it's nothing to fear.
However, reading this NatGeo article about the destructive symbiosis of invasive parasites & seeing the accompanying photos might make someone change their mind- if the parasites haven't already done it for them...
George Lucas was ridiculed for including "Midichlorians" in the Star Wars prequel movies, as the microbiological source of the mystical energy field surrounding all living things- The Force.
Like so many things, Lucas was actually prescient in his recognition of the influence of symbiotic microbes on a living being.