Yahoo! Finance:  Consider this statistic: A third of all couples retire within a year of each of other.

Though there are a number of explanations regarding age and money, the answer that researchers keep coming back to is that couples really do enjoy spending time together, says Courtney Coile, an economics professor at Wellesley College in Massachusetts.

It doesn’t matter if you want a house full of grandchildren, or quiet walks on the beach with your partner, to make the most of your golden years, set lifestyle goals, understand your cash flow, and create a plan for asset allocation, longevity risk and wealth transfer.