Among those whose partner kept a secret but didn't lie, only 43% said it created distance.

WSJ: Lying to a Spouse: Relationship Advice on How It Can Be Healthy

Will Evans is a reporter for the Center for Investigative Reporting, NPR's partner for the Secret Money Project.

NPR: Profile: Health Care for America Now

Actress Kate Winslet has married her partner Ned RocknRoll in a secret ceremony in New York, it has been confirmed.

BBC: Kate Winslet and Nedrocknroll

You may want to keep a foreign bank account secret from your spouse, employer or business partner.

FORBES: Beware Bank Interest Reporting Even For Nonresidents

"Some women became hooked on the espionage itself - the excitement and intimacy of a shared secret - and they could be directed towards another partner if the first had to vanish for security reasons, " says Wolf.

BBC: Spy in the house of love

Mr Dervis makes no secret of his wish to work with Mr Cem as a possible coalition partner.

ECONOMIST: Turkey: A man for all Turks? | The