Such An Easy Good Deed

Do you let other people go ahead of you in a checkout line if they have fewer items than you?
Sometimes when my cart is full of items, I let others go ahead of me if they have a couple of items.
I hope others will extend the same courtesy to me, should I ever require it.
It is doubtful it would ever happen to me as I always purchase too many items. I make a trip to the market with the intent to…