At the checkout queue earlier, I asked the man behind me if he’d like to go in front of me - he had about 4 items, I had a trolley full. He gratefully accepted.
But the woman behind him said “you may have time to spare, not all of us do”.
I just said I was sorry and turned away. I’ve never thought of it from her point of view before, I’ve always thought I was doing a helpful thing.
Don’t do it in future or carry on as usual?