...I've had a few instances over the years by older lady cashiers. One time at the local(now closed)mom & pop pharmacy, I bought a bag of Ambeeze adult disposable diapers(these were wingfold & exactly like the first pampers, plain white & two tapes). Anyways, it was just before July 4th and the older lady said, "You know, we're going to be closed a few days for the holidays, so you might want to get another bag of diapers so you don't run out." So, I did and grabbed another bag.
...at a medical supply store(which is still open to this day)I brought a pair of DuroMed pull-on plastic pants up to the counter. The older lady cashier asked, "Are you the one who was in here last week and asked if they would work over cloth diapers?" I just calmly said, "No, that wasn't me, but that's exactly what I'll be using them for". She just grinned and said "Ok, there are a few more pairs in this size if you need more" I just said thanks and left.