I'm with YNK, wife and I have a joint checking account where our direct deposits go and to pay bills from, and then a shared CC that most of our expenses go onto.
We still maintain our accounts that we had prior to marriage, mostly just for buying gifts for each other so that they don't show up on the statements of our shared account
. I also have a few sneaky things like gambling funds that I put into my own account just so my wife doesn't yell at me
I handle all our finances, I don't even think my wife ever looks at our statements or anything. If we go crazy with spending one month I kinda just tell her, hey, take it easy on the online shopping or stop buying the super expensive guac from Whole Foods and she will listen, and it will be a little better the next month. We are fortunate to be in a pretty decent financial situation so it's not this super-stressful endeavor to make sure our bills get paid every month. There was a time prior to marriage where we had to be super careful about what bills we paid when based on when we got paid, fortunately those days are behind us now.