Why Novelty Is the Secret Ingredient for Lasting Love, According to a Psychologist

June 1, 2026 - 01:00

Most people assume that long-term love depends on comfort, stability, and knowing your partner inside and out. But a growing body of research suggests the opposite: the number one thing that keeps love alive is the willingness to keep discovering new sides of each other.

Psychologists point to a concept called "self-expansion." When a relationship first starts, everything feels exciting because you are constantly learning about the other person. That novelty triggers dopamine and keeps the bond fresh. Over time, couples fall into routines and assume they already know everything there is to know. That is when passion tends to fade.

The key, according to studies, is to intentionally create experiences that reveal something new. This does not mean grand gestures or exotic vacations. It can be as simple as asking a question you have never asked before, trying a new hobby together, or sharing a hidden dream or fear. When one partner shows a side of themselves that the other has not seen, it reignites curiosity and admiration.

Researchers have found that couples who report high levels of self-expansion also report higher relationship satisfaction and lower rates of boredom. Boredom, in fact, is one of the strongest predictors of relationship decline. The antidote is not more time together, but more novel time together.

So if you want love to last, stop assuming you already know your partner. Treat them as a person who is still growing and changing. The secret is not finding the perfect person, but staying curious about the one you are with.