10 Unwritten Rules of Interpersonal Communication:
1. In the restroom, don't gossip about others!
2. If you're on a blind date and leave for some reason, it means you're not interested!
3. A woman who says her husband is "useless" in front of you is likely envious of your life, so be cautious with your words.
4. When something is difficult to handle, it often means the benefits are insufficient, even if your relationship is good!
5. Learning skills from relatives is not much different from working for them, and can easily lead to resentment!
6. When giving a gift to someone, it's best not to bring them along to buy it, as it may make them uncomfortable!
7. If you work at the same company as relatives and one of them is a leader, don't disclose it to others!
8. Jokes made by infrequent acquaintances are often the truth.
9. If several people are surrounding you selling something, the commission is often very high, so proceed with caution!
10. Women tend to prefer a younger version of themselves, so titles are very important!