They have a tradition where every single person must write a card to every single other person. That means if I spend Christmas day with MIL, FIL, SIL, her husband and their 2 boys, I have to write 7 cards from me (one for each of them), DP has to also write 7 cards, both my girls have to write 7 cards each, and all 4 of us will receive 7 cards each! There are over 50 cards being exchanged by 11 people all sitting in the same sodding room.