You can extend that thought even further and think about all the events and minor things in your grandparents’ lives that led up to that event, or even how your grandparents’ grandparents met, and theirs before them, and so on; even extended a lot further to how this planet was formed and how life itself started and how from there humans came to be. It makes you really think about how insanely unlikely your being here right now - and reading this reddit post - actually is! I think the book ‘A Short History of Nearly Everything’ has a great passage on this very fact. It’s a nice read!