I don't think you should fight. I think it's healthy though to raise your opinions and talk about them and come to a conclusion. My boyfriend and I don't really 'fight'. We have moments where something comes up that causes tension or emotions to run high.. maybe one of us says something that ends up triggering something.. but then we either talk it out.. or more likely we will be quiet, on skype doing other things for a bit before we talk again. We are both quick to resolve issues. There hasn't been a very serious one.. and when there is something serious, we let the other person talk it out and explain it. We both try and avoid conflict. I am more likely to get emotional when upset and he is more likely to go into a bit of a depressed quiet state, and I had to learn to let him be quiet during those moments because as much as I wanted to talk to sort it out right away and talk it out, I realized that made him more upset and he needed the quiet time just doing something else on the computer (while on skype) to calm down and then we talked and sorted it out.

I think when people say "fighting is healthy", they mean, it's healthy to disagree about something rather than hold in your opinions, so that you can feel free in a relationship. It would be unhealthy if you would hold in what you think because you didn't want to 'fight.' But I don't like 'fighting' in the really loud sense, because they are scary to me. I prefer to try and understand my boyfriend rather than yell at him. :P But I know each couple has different ways of working it out and sometimes a couple might need to have a 'fight' but all couples 'fight/disagree' in certain ways. And the way you handle them lets you know whether or not your relationship will make it, or at least is one of the factors.. because the better you are able to resolve conflicts (with both of you satisfied about the decision) the better.. so I think it's good.

And also.. just because you haven't had a big fight, doesn't mean you won't ever.. but if you can resolve a conflict through discussion, it's better.

My SO and I don't "fight" either. We've had a few disagreements but we have the same conflict-avoidance tendencies so any disagreement or miscommunication is resolved through either: one person sucks it up and mentions that he/I didn't appreciate such and such that was said, or, more often, we end the conversation nicely but quickly and don't speak for about half a day and then say, "sorry, I was irritated with you for "x" but it was a petty reason to be angry and now I am not" or something like that.

If you haven't fought in the ways that are stereotypical to fighting, don't worry about it. Different people bring out different reactions so this relationship might not happen as previous. I agree with Squeeker, it is healthy to discuss a disagreement and come to a reasonable conclusion. Don't sweat it.

Me and my SO rarely raise voices either, but we are only together for a few years so really still in that Honeymoon stage. For several years me and my Ex got along fine, we were the couple everyone envied. We were the cute couple always laughing and having fun and really to this day we could sit around and laugh together. We lacked passion. Oddly enough by the time we started to fight the passion started to surface but it was too late because the damage was done. I think there is a healthy amount of fighting but I don't think there is any set amount of what it should be. Just be yourself and don't hold back and they will or will not come eventually. When they do, you work through them and grow and move forward and have awesome make up sex.