I am curious, what the other side of that coin is. How people in functioning couples, do the money/bills together. So that it's fair. Unsure if this means shared accounts, or separate. I suppose it's complicated if you do things like buy a big asset (house) together. I've just never known what people in functioning r'ships do about this (i was brought up never to ask about money, so now i'm ignorant).
DH & I have everything joint now with an account for personal spending each. We pay ourselves an allowance each month & everything else goes on mortgage/bills. I do all the budgeting & bill paying because DH has no clue. We are lucky that both of us have a similar view on finances so we have never ever disagreed or argued about money.