Why Does Desire Fade?

15th November 2025

The conventional explanation for why desire fades in long-term relationships is familiarity. But this is a curiously weak account. We do not lose our appetite for Indian food simply because we have eaten it many times, or find Rembrandt's self-portraits less arresting because we know them well. Familiarity, on its own, does not explain the erosion of desire. It merely redescribes it.

Something more structural is at work. At the beginning of a relationship, before love and knowledge have accumulated, sex is often remarkably easy. As the relationship deepens — as we come to know and genuinely care for the other person — the

erotic can quietly drain away.  It suggests the problem is not familiarity as such, but a tension between eroticism on one side, and love and knowledge on the other. These things, which we imagine should reinforce each other, can in practice pull in opposite directions.

The recommended cure tends to make this worse. We are encouraged toward more intimacy — more openness, more sharing, more closeness. But if the problem is already located at the intersection of love and desire, prescribing further closeness is less a solution than an intensification of the difficulty.

What actually grows, as a relationship deepens, is not familiarity but anxiety. And anxiety, as any clinician knows, is the enemy of desire.