We're beginning to recognize that it may not make sense to work at just one job for your entire life, retire for a few years and then die. Instead, we're more likely to take a cyclic approach to life—education, work, and leisure—and mix these up throughout our lifetimes. People are going back to school at 45, 65, even 80. People are having second, third, fourth, even fifth careers. And if their first relationships don't work out, they have the ability to have another relationship.