1. War is just the worst. It brings out the worst in people and makes living the worst for those who stay good.
2. People in history must have just been cold all.the.time.
3. Watching babies cry in movies is waaaay more traumatic now than before having a kid.
Case in point for all three, this scene:
<iframe width="560" height="315" src="https://www.youtube.com/embed/U4ZtDr6CqD0" frameborder="0" allowfullscreen></iframe>