Only when you've both studied the blade

I wouldn't say they're necessary but I think conflicts and disagreements are a good way to just release tension and resentment so you can be honest about whatever you may be feeling. Obviously there's a point where it can get counterproductive and people say things they don't mean in the heat of the moment, but that aside I think they can actually benefit communication. Being pleasant and agreeable all the time to avoid conflict can actually be very emotionally detrimental, so a healthy skirmish every once in a while might be good in the long run.

I wouldn't say necessary. I'd prefer to see them as inevitable. I think learning the ways to handle/solve these conflicts is kind of a necessity in order to have a healthy life. Sometimes the way to solve the conflicts is by terminating the relationship.

I wouldn’t say necessary, and most certainly not in excess.

I don't think so..

To avoid all conflict is pretty unhealthy - better to be direct and honest. To let problems ferment will only help add to some additional hot air.

Conflicts are inevitable in any relationship, but I don't think solving those necessitates fights

it's unhealthy to bottle up, and while venting at friends and family is only natural I believe the occasional fight might be also helping in forming (not neccesarily maintaining lol) a good relationship, kinda like work-hardening.

No.

Yeah, I don't know about necessary so much as inevitable ...there's an old saying I like - if two people agree all of the time, one of them isn't necessary