It's considered acceptable in our culture to approach perfect strangers, as often or not who may be in extremis, and evangelise. I don't see why that's considered a normal thing. ↗
If two friends ask you to judge a dispute, don't accept, because you will lose one friend; on the other hand, if two strangers come with the same request, accept because you will gain one friend. ↗
We sometimes encounter people, even perfect strangers, who begin to interest us at first sight, somehow suddenly, all at once, before a word has been spoken. ↗
When people ask me what I do, strangers on a plane, perhaps, I tell them that I think. Thinking is excellent exercise, as much as swimming or jogging. ↗