I have almost got used to the boys managing to injure each other. To start with, it was nearly always Zachary being slightly overzealous with Leo, although Recently Leo has begun to get his own back. I left the room the other day to go to the kitchen and whilst my back was turned, heard Zachary start to cry.
When I asked him what hurt, he said Leo had hurt his tongue. I then started my usual talk about Zachary not putting his head/hands/other body part in Leo's way as Leo tends to grab and squeeze. Zachary told me Leo hadn't grabbed his tongue. Oh. When I asked how it had been hurt, it turned out Leo had bitten Zachary's tongue. Least said and all that!