I did that for a decade my first turn on the marriage-go-round, and it presented some bookkeeping difficulties. For example, as I attempted to balance the checkbook in those balmy days before online banking I would say "Lookee! All our bills mailed timely and we've still got almost $150 to tide us over to next payday"—and then the spousette would fish out a wad of ATM receipts and I'd have to rob a convenience store or roll a crippled newsboy to avert the otherwise inevitable multiple overdrafts. These days #2 and I maintain and balance separate accounts. Since I have a steady income and hers fluctuates wildly I attempt to maintain matters so that I can cover our essential expenses even when she's experiencing a drought. Sometimes the droughts are prolonged, and I become anxious, but when they break we have these nice spells of extravagance. In ten years' cohabitation I don't think we've ever had sharp words over money.
cordially,