A very common one would be I'm so hungry I could eat a horse
The world would be a much happier place because if everyone helped each other there would be much happier people knowing that other people have their back and are willing to help each other. An act of kindness will help the community be better because even if you do one small little thing for one person they might be motivated to start helping other people and so on.
Hank hates Brian, Brian tries everything he can so that Hank will like him. Brian tries to help out and be nice to him.
