Refrigerator door culture.  At some point in life you will no longer be permitted not to have magnets on your fridge.  I made it until I got married.<p>Weaponized clothes are a thing too.  Everyone knows nobody likes getting someone elses choice of clothes as a gift, especially not kids, but it is a socially acceptable weapon to kinda &quot;get&quot; the recipient.  More a slap to the face than a punch to the face, but none the less kinda an aggressive act.