I think at certain stages of our lives we look back. It can happen at any age but I think there is something about 50 that makes a person think about his/her life.
Also, I think those things we missed out on leave a scar that gets irritated or inflamed from time to time.
Why now?... is always a very good question to explore.
(((Pom))) I just love that you have the memory of dancing with him...your little feet on his grown up feet
Perhaps that memory stays with you...to remind you that he was loving. And perhaps also, a memory like that could make one wish there was more of those kinds of experiences with him... at all stages of your life.