Explain tv characters relationships

I’m studying psychology and studying different relationships portrayed on tv.

Choose one :

1. Marshal and Lily

2. Ross and rachel

3. Harley Quinn and joker

4. Amy and Ben , Amy and Ricky

5. Barney and robin

6. Monica and chandler

List the good and bad of the relationships you’ve seen. Also if the relationship was good or toxic. What would you do if you were in their shoes .If you have more tv character couples to compare feel free to add.