Is there a third extra or is there not?

What do you think about the fact that sometimes there is a third person in a relationship? Is this one potentially superfluous or not? For example if it's the parents.

I don't think there should be a third person in a relationship. Because they don't live with us, they don't know the whole situation. And so they can give bad or inappropriate advice.

Yes, there's some sick advice. But I think everything has to be analyzed. After all, if you mindlessly do everything as they say, then it's no longer a relationship between two people in love, but between three people.

Do you agree with me? Have you ever been in any of these situations? How have you dealt with them? Or did you listen?