A big surprise to me has been learning how many women maintain a separate savings account with money, just in case something happens. On the one hand, it's a smart thing to do. On the other hand, I don't know any guys who have a separate savings account - even when the woman is the primary breadwinner. Maybe that will happen over time.
Do you have a savings account separate from any joint accounts? (And if so, is it a secret savings account or does your SO know how much is in there.) Or do you both bank separately, so this is a moot point anyway...