I am buying diesel. I pass the card to the cashier.
“It’s this side” she says firmly, indicating her left.
So, I go round and pass the card to her left hand instead, whereupon she swipes it and carries on.
I thought perhaps there was some sort of disability preventing her from using her right hand to pass the card to the left, but I watch her afterwards and it seems not: just a rather extreme case of laziness.