In his interview with Allen, Gates was unfairly coy when asked what he learned, citing knot-tying, basket-weaving and hiking as his chief lessons.

FORBES: Bill Gates And The Business Case For Reversing The Boy Scout Gay Ban

Almost four-fifths of those tying the knot were from out of state.

ECONOMIST: The wedding waltz

Celebrities who are making millions of dollars tend to make sure they have a pre-nup in place before tying the knot as a way to secure their assets.

FORBES: Putting Romance Before Pre-Nup Put Katy Perry's Fortune at Risk

Their nest: For many couples, tying the knot is followed by a home purchase, which could mean qualification for the home-buyer tax credit.

WSJ: Newlyweds, Don't Forget Your Taxes

But when I co-founded a business with my husband in late 2009, less than a year after tying the knot, I was sure I knew what I was getting into.

FORBES: 5 Questions To Ask Before Starting A Business With Your Spouse