Can a husband sign and cash his wife's check?

Not legally but many spouses do for each other that have been together a while and share accounts etc. as a matter of course. Sometimes a spouse will pick up a husbands check and cash to get groceries before he gets off work. Of course his signature/id should still be required but small liquor stores etc start to bend rules on smaller checks after you build a relationship. I have been with my mate over 30 years and to be honest, don't think the bank would even know her signature anymore and entirely with her consent, since she hates paperwork and i am "bookish".