Here they are below. Let me know what you think!
1. Being unattractive. Which is totally subjective and not specific at all. I guess that’s what happens when you combine too many studies.
2. Living an unhealthy lifestyle, like smoking or drinking too much.
3. Having undesirable personality traits, like being lazy or having a bad sense of humor.
4. Having different religious beliefs.
5. Not being the same social status.
6. Having different attitudes toward having kids.
7. Having different relationship goals.
Would you add anything to this list??