Absolutely top OP.
It might just be my local supermarket, but I always head for the shortest queue. Irrespective of who is on the till, Male, female, old or young.
I’m a dab hand at self service if I’m only using a basket.
I try to cheer myself up when shopping cos I bloody hate it.
You can try this yourself.
Select a married couple pushing a loaded trolley and if you can...... drop in a bottle of expensive whisky without them spitting you.
Great laugh if they get to the till without seeing it.
“What the hells this George” the wife looks with daggers at her old man