A very good reason to keep some money separate. :-)
Money is one of the things that my husband and I have never really argued over. We just ask each other if it’s ‘ok’ to buy something, and we both usually say ‘yes’.
That's what I'd call a perfect marriage. Talking honestly with each other about money (just as you do) is exactly what all couples should do.
Oh, Money is the least of it.
He makes me breakfast every day, too - and he’s a better cook than I am. :-)