I'm fortunate enough to have been born with two complete sets of grandparents, two sets of great-grandparents (both on my fathers side of the family), and even one great-great-grandmother who is actually in my earliest memory of life. Each time one passed away, their spouse remained single for the rest of his or her days. It seemed logical to me at the time, and I couldn't imagine any of my grandparents ever dating someone else. Now, as I approach my senior years, I see life differently. Society has changed a lot in the intervening years as well.