Lol, someone asked me the same question yesterday, so I'm going to link my reply to him here.
https://peakd.com/hive-174578/@freedom007/re-erikah-2022716t9254803z
But to answer your question, OCD should be your last choice, when you've checked all the communities and you think there's no community created for the topic you're posting about.
Now I understand. Thanks a bunch.
You're welcome.