You should try shopping with a DH, who has dementia, in tow, who keeps disappearing, selects stuff and then puts it back somewhere else, Puts things in and takes things out of other people's trolleys, usually requires a couple of toilet visits, usually when we are next in the Q at the check out and has been known to swan off outside, looking for the car, when I am half way through the checkout - nightmare. It can take nearly 2 hours to do the weekly shop, only to arrive home and discover that he has 'put back' essential items when my back was turned.