"In most marriages one spouse is more of a 'saver' and one is more of a 'spender.' Even when both partners are savers, one of them is usually simply more comfortable with spending than the other. And to make things more interesting, the savers are also usually more oriented around planning and structure, where the spenders often value having a bit more flexibility".....
https://shaunti.com/2023/08/the-saver-spender-disconnect-in-marriage-and-how-to-handle-it/