I absolutely cannot accompany Mits to the grocery store. She keeps an "accordion folder" of coupons, filed in some obscure, inscrutable method. She will spend what I consider an inordinate amount of time randomly (to me, anyway) going through the aisles, checking shelf items against her collection of coupons, selectively putting some things in the basket... but she has amazed me at how "efficient" she is when she tells me how little she's paid for the goods. Even got two bags full of groceries once and given two dollars to boot!
So we've got a mutually beneficial symbiotic relationship: she bags an' drags it, I skin it an' grill it. :wink: