When I was in high school, I had a crush on a fellow student that happened to live in room 23 of her dormitory. It wasn’t too long before I found out indirectly that she actually had less than no interest in me and so I didn’t attempt to pursue any kind of relationship with her — I just didn’t want to get hurt. Not long after these events, however, I began noticing that the number 23 was popping up everywhere. I would notice it on a box of cereal, or a page in a library book would be dogeared to that exact page. What a coincidence, I thought, that I had recently had a crush on a girl who lived in room 23 and now the number seemed to be following me everywhere I went.