I suppose if a mod so desires, they can feel free to bring over all posts in the 'irritated' thread on this matter and drop them here.
Mrs.jingle and I seem to be a mix of a few of the other comments made. She's been a stay-at-home-mom since the jingle.kids were born, and (except for a 2-year period when they were 8 years old), has not had an income producing career. So, technically it's all MY money.
In reality, I treat it like it's all OUR money. As far as I'm concerned (and no dis to anyone else - to each their own), the union of our marriage includes the union of our finances. It's just how I see it. I'm 100% responsible for all the finances - income, savings, bill payments, etc... I don't know if she would even know how to pill the utility bills!
Ultimately, we have 2 bank accounts ... they are both joint accounts, but one is 'hers' and one is 'mine' - simply because my paycheque is deposited into 'mine', along with all of the regular big-ticket monthly payments/expenses.
As for investments, we have combinations of long-term and short-term vehicles, some are joint, and for tax purposes, other investments that are in my name and others that are in hers.
But at the end of it all, I don't view any separation of what's mine vs what's hers. All of our assets (and liabilities) are both of ours.
I know that we are EXTREMELY fortunate for the financial position we're in - I've done well enough in my career and financial planning that we've never had to worry about whether we can or can't / should or shouldn't make any given purchase - big or small. We're both pretty responsible on what we spend, so (as Gary mentioned), there's never any new assholes being ripped for any spending we do, but there's the odd 'did you really need that?' from both of us to the other.