After I posted above I realized all 3 of my sons have either Costco or Sam's Club memberships.
I have been with all 3 of them at times shopping in them with wives along and it occurred to me,
Sons--- focused on home supplies (TP, Paper stuff, soaps, dental stuff, cleaning stuff, water, things like that)
Wife --- always, always says "While you do that I will go look at clothing deals/bedding/towels)
they would rejoin and then he is looking at meat and frozen veggies while she is looking at already prepared meals.
I guess it's good they have a system going but it suddenly seems funny to me that all 3 families shop the same way.