Well no, myself and my partner have never argued and we've never bickerered in the 2 and a half years we've been together. We just respect each other, we know what ticks each other off so we don't do those things. If we have a difference of opinion then we talk about it constructively. Just because a couple don't argue , doesn't mean there's something wrong. It's possible to have a relationship without arguments and snapping at each other.
I've been with my fiancé for a decade now so I find this absolutely fascinating. To set the scene: We lived with our own parents initially in Canada, then did long distance for a year and a half when I first moved to London, he then moved over to to join me and we've lived together ever since. We have a dog we got together and we own a condo in Canada which we rent out. We don't properly argue (i.e. yell/shout) but we definitely have strong discussions, have cried on occasion and are capable of irritating one another. We learn about each other through the process which is invaluable to moving our relationship forward. On another note, I love my mom to death, a relationship we've had since my birth, and we're capable of having heated chats as well.
I'm not a fan of the explanation of "we just respect each other" to conclude never arguing which you mention -- you can respect someone and, at the same time, have a non-calm way of communicating and expressing yourself. It's not as simple as "we know what ticks each other off so we don't do those things".
I'm not sure how old you are or if you share assets or if you have gone through proper hardships together like family deaths and financial crises. I'd say my fiancé and I never had a cross word for the first few years of our relationship either (and I'd tell my friends that with pride in a similar way that you share it on this thread) -- eventually, we went through
tit, hard times, and we properly let each other in. It's really liberating, actually, being able to not restrict yourself from "[doing] those things" just because it "ticks [them off]". The level of comfort you can have with someone, knowing you can be a little crazy and they'll still love you, compared to mostly everyone else in the world, that's the good stuff and can contribute to making them your special person.
Please don't take any offence, I'm genuinely curious as I've only dated one person who is the one I'm still with now. I always wonder if we had gone through different things in the past 10 years if we would've maybe argued more or less or if it's just down to the 2 people's personalities that determine it.
To get this back to Dimbobs and DJ -- I think the issue there is that Dimbobs is passive aggressive and DJ is just passive. Ergo, no arguments/heat!