Novelty and Play: Keeping a Long Relationship Alive

**Habituation** — not a lack of love. Your nervous system treats familiar things as low-priority and stops generating excitement around them. This is efficient for daily life but corrosive for romance. **Arthur Aron's self-expansion theory** explains that relationships feel most alive when both partners are growing through each other — learning new things, entering new situations. Once the initial exploration is over and routines calcify, that growth engine stalls. The fix is not to recapture early infatuation but to build in fresh input that restarts the expansion.

**Arthur Aron** coined self-expansion to describe how we grow our sense of identity, competence, and perspective through close relationships. Early on, a new partner represents a flood of self-expansion: their tastes, ideas, skills, and social world all become partly yours. As the relationship matures, that expansion slows. Aron's research shows couples who deliberately seek **novel, mildly challenging activities together** recreate that expansion signal — and that the resulting excitement is subjectively indistinguishable from the excitement they once felt just being together. Self-expansion is, in effect, a renewable resource.

Enough to break the routine without overwhelming your schedules. **Gottman and colleagues** cite Howard Markman's research tracking couples since 1996: even modest doses of deliberate fun — a few genuinely new activities per month — reliably predict relationship satisfaction years later. The bar is not exotic vacations. A neighbourhood you have never walked, a recipe neither of you has made, a film genre you always skipped — novelty is relative to your personal baseline. What counts is that *both* of you are slightly outside the usual.

More than most couples realise. Play is not a luxury reserved for new couples or parents with children underfoot — it is a **tension-release mechanism** that keeps conflict from corroding the relationship. Elder Karl Pillemer, who interviewed hundreds of long-married couples for his book *30 Lessons for Loving*, found that the ability to laugh together — especially at absurd or frustrating situations — was one of the most consistent predictors of long-term satisfaction. Couples who play together have more resources to draw on when the inevitable hard stretches arrive.

Anything both of you find genuinely new and at least slightly challenging. Some examples that work: taking a class in a skill neither of you has (pottery, salsa, improv); hiking a trail you have never done; visiting a city neither of you knows; picking a restaurant that serves a cuisine completely outside your repertoire. The key is **mutual unfamiliarity** — a favourite restaurant of one partner is not novel for either, because the expert drags the novice into their comfort zone rather than both stepping outside it together.

Yes. The science doesn't care whether the novelty was planned or accidental — the experience itself is what matters. **John Gottman** makes this point directly in *Eight Dates*: most couples wait for spontaneous adventure, which means it rarely happens. Scheduling a 'fun night' with a new activity each time is not unromantic; it is the structural solution to the problem that adulthood crowds out play. Think of it the way you think of a gym slot — the scheduling is not the workout, but without it the workout never happens. Our guide on [how to plan couple time without killing the romance](/en/blog/schedule-couple-time-without-killing-romance) covers the logistics of making this sustainable.

That difference is actually an asset, not an obstacle. Novelty requires stepping outside your own comfort zone, which means your partner's unfamiliar preference *is* the novel activity for you — and vice versa. The rule is **mutual willingness**, not identical taste. Take turns choosing. The partner who chooses accepts full responsibility for logistics; the other commits to genuine engagement rather than tolerating it. Repeated turns create a shared catalog of experiences that belongs to both of you, even if the ideas originated elsewhere.

**Humour de-escalates**. When one partner finds something absurd in a frustrating situation — and the other can join in — it breaks the physiological arousal that turns a minor disagreement into a lingering resentment. This is distinct from deflecting with jokes to avoid real issues. What Pillemer's elder respondents described was a shared orientation: a kind of 'us against the absurdity' stance that preserved the sense of alliance even under stress. Couples who have built a rich shared joke catalog through years of play have more de-escalation tools available than couples who kept things serious.

To a meaningful extent, yes. **Aron and colleagues (2000)** ran a series of studies in which long-term couples completed either exciting-novel tasks or pleasant-familiar tasks for 90 minutes. The couples who did the exciting-novel activities reported significantly higher relationship quality immediately after. The mechanism is **misattribution of arousal** — physiological excitement generated by the novel activity gets attributed partly to the partner. The effect isn't permanent, but it is real and replicable, which is the point: novelty works not as a one-time cure but as a practice.

Start small and concrete. Pick one activity neither of you has done and put a specific date on the calendar — not 'we should try that' but 'Saturday at 7.' Keep the stakes low; this is not the moment for a weeklong trip to Japan. The goal is to rebuild the habit of shared exploration, not to compensate for years of routine in one grand gesture. Once the habit is established, you can scale up. For the broader picture of what sustains love over decades, the post on [keeping long-term love strong](/en/blog/keep-long-term-love-strong) maps the wider maintenance landscape.