Are we all somehow connected to each other?

While on a sailing holiday in the Mediterranean last year (2016), our three children became good friends with the children of another family. After a few days, my youngest son remarked that our family really did have a lot in common with the other children's family. I asked why that was and he explained that their parents and I were in the same profession. The mother and I chatted pleasantly all afternoon before we realised we had worked for the same local radio station at the same time twenty-five years earlier. Over dinner with the two families, it emerged that her husband and my husband grew up just streets apart in London. The father's sister works at the same school attended by one of my children and the mother's brother used to teach there. When I told this story of co-incidences to a new colleague at work, it transpired that her sister was married to the former business partner of the man who owned the company that ran the sailing holiday.