Sometimes an example can go a long way. I grew up in another state than the one my maternal grandparents lived in, but I did travel to join their sixtieth wedding anniversary celebration with most of my thirty-four cousins. That's surely helped me and my wife (whose parents have also been married six decades now) stay together for more than twenty-five years. She and I grew up in different countries, speaking different native languages and eating different foods, and have changed radically from our former selves over the years, but we are still each other's best friends.