"The Six Buttons of Buzz"Mark Hughes calls these conversation starters the six buttons of buzz. Based on his research, the following topics are very effective at getting people talking:
1. Taboo (controversial)
2. The Unusual (unique)
3. The Remarkable
4. The Outrageous
5. The Hilarious
6. Secrets (kept and revealed)
Source:
https://blog.kissmetrics.com/online-buzz-marketing/