Why couples are ruder to each other in public than strangers

I was just trying to get through the Aldi on a busy Saturday afternoon.

You know how it is. Midday on a weekend, every lane packed, carts bumping, people reaching across each other for the last thing on the shelf. It’s controlled chaos on a good day. I was minding my own business, working my way up and down the aisles, when I became an unwilling audience to something that stuck with me long…