According to Hassan Thawaini https://www.numan.com/mens-health/could-sex-be-the-answer-to-a-longer-lifespan

"More sex doesn’t just equal more birthdays. Some people in better health may simply be more able (and more interested) in sex to begin with. But there is a growing body of evidence suggesting that sexual wellbeing is tied to how we age.

Sexual wellbeing, that is, the feeling of being connected, desired, and satisfied, taps into some of important pillars of health, namely emotional support, stress reduction, positive self-image, and physical fitness.

Researchers have suggested that good sex can boost heart health, strengthen immunity, reduce stress hormones, and improve sleep, all of which are known contributors to longevity. Intimacy can also act as a form of emotional support, protecting against loneliness and depression, both of which are major risk factors for early death.

Interestingly, studies find that it’s not just how much sex you’re having, but how much you enjoy it. One study found that older adults who enjoyed their sexuality lived longer, but only if they considered it an important part of life. When sex stopped becoming a priority, the link between it and longevity disappeared."

Thwaini concludes...

"Sex won’t make you immortal. But when it’s meaningful, enjoyable, and valued, it can act like a signal of overall wellbeing. The secret to living longer probably isn’t any one thing. It’s a collection of habits, relationships, mindsets, and joys that keep you connected to life. In that sense, good sexual wellbeing might not be just about adding years to your life, it’s about adding life to your years and not taking those ‘little’ moments of intimacy for granted."