Less than 6 degrees between me and.....everyone else!

I've always been fascinated by the "six degrees of separation" theory (that  anyone on the planet can be connected to any other person on the planet through a chain of no more than five intermediaries).  
Microsoft recently analysed 30 billion electronic messages and their finding was 6,6deg of separation.   Close enough.
Trekking to Everest base camp in 2003, Deshun met an Australian solo trekker, Kirsty.    They became friendly and trekked together as far as Base Camp where they parted company, Kirsty to trek back down to Kathmandu and Deshun to prepare for the Everest climb.     About 2 years later Deshun addressed a TGIF group at Seattle Coffee in Hyde Park and after her talk a woman came up to her and said "hello, stranger!". 
Yup, Kirsty was passing through Jo'burg on her way to the Displaced Peoples camps in Northern Uganda (another time I'll tell you more about this incredible woman and her amazing work in Africa) and had been invited to TGIF by a friend who'd said a female mountaineer would be speaking and he thought Kirsty would find it interesting.
This morning I was searching Facebook for a distant business connection and there, right above his name, was a listing for a Blast from my Past!  So what, I hear you say, you're supposed to find people on Facebook.   But then, you see, that 6 deg thing kicked in again and I saw that the BFMP shares some "friends" with Deshun!