answer:One solution: All money is shared. There is no ‘who’s paying for what’ because everything earned goes into one account, and everything spent comes out of that one account. Everything is joint, so there is no ‘mine’ and ‘yours’ to fight about. [Obviously there must be basic trust in decisions/expenses, and who takes care of what bills/paperwork is delegated.] I’ve heard of other approaches, but most of the time I hear about feelings of unfairness, resentment, etc.