the Coolidge effect

The Coolidge effect is a biological phenomenon where animals (including humans) show renewed sexual interest when introduced to new partners, even after becoming satiated with previous ones. It suggests that novelty can trigger increased arousal and motivation for sexual activity. This effect is thought to be driven by evolutionary factors, encouraging diversity in mates, which can enhance genetic variety. In essence, the Coolidge effect highlights how the brain's response to novelty can influence sexual desire, maintaining interest and activity over time by responding differently to familiar versus new partners.