When one starts, the other joins in. Either because it’s so upsetting watching your sibling cry, or because they know that if they cry too, they get in on that sweet attention. If they’re both pooing and crying, just give up. Call in reinforcements.
I was even a little proud when I had to stay behind to talk to the teachers because you’d been a bit naughty.
After a day of battles over seat belts, eating vegetables, getting dressed, not putting your toy animals in the precise position you desire…. I love you more than ever.