Let's say your husband or wife went behind your back and racked up $20,000 in credit card debt.  Would you be as upset as if they cheated on you?

Most people say . . . YES.

According to a new survey from MSNBC, almost two-thirds of people say that honesty about money in a relationship is as important as being faithful.

And that's too bad . . . because 37% of men and 56% of women admit that, at some point, they haven't told their partner the truth about money.

25% of women and 8% of men have said they bought something on sale when it wasn't.  Women are also twice as likely as men to hide receipts or purchases.