British here, everyone i know keeps eggs in the fridge. I assumed if they weren't kept in fridge they would go off, but now i actually think about it they aren'

British here, everyone i know keeps eggs in the fridge. I assumed if they weren't kept in fridge they would go off, but now i actually think about it they aren't in fridges in the shop... It does say on the box though to refrigerate after purchase so i have no idea... WWhy is my house different to shop?