Importantly, jokes and gentle humor were not the only heroic behaviors that showed up in greater abundance in the marriages they followed. All the positive ways we can behave toward someone became more evident as the years passed, but primarily humor, enthusiasm, and validation (actively listening to and understanding your partner). Criticisms dropped off, as did the truly toxic, divorce-courting habits like stonewalling. Men demonstrated less anger, and women less contempt.

One outcome of the study was more in keeping with grimmer perceptions of marriages: Older couples were not more affectionate with each other. They either exchanged about the same number of caring statements and compliments through the years, or, wives offered fewer of them. But there was a silver lining here, too: Those trajectories, the researchers write “offer support for the idea of love evolving as adults age.” Psychological studies—and, I’m guessing, anecdotal evidence from the long-married couples you know—have proposed that couples start off with a sense of passionate love that morphs into “companionate love” in time. Humor, they say, is arguably an expression of the second kind of devotion.

It’s worth keeping in mind that the study had several limitations, including a relatively small sample size, and a limited representation of marriage. It did not include same-sex marriages, for instance, or couples going to marriage counseling. It also only dealt in averages.

And of course companionable humor is no guarantee of a relationship’s longevity. Anecdotally, it’s easy to point to couples that survived decades without a hint of shared laughter or goofiness, or ones that ended despite a healthy quotient of humor and compassionate behavior.

However, the study’s strengths, compared to similar research, give it credence too: The couples’ interactions were coded by an observer, so the results didn’t rely on self-reported measures. Also, the team quantified behaviors, not subjective constructs like “satisfaction” or “happiness.”

Perhaps the main takeaway is that everyone is taking themselves a bit too seriously. It’s worth remembering that the next time you find yourself in a spat with your significant other—and trying to look for the humor in the situation. Perhaps your weekly argument is just an inside joke waiting to happen.

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