Why is sex fun?

From a biological standpoint, it’s a rather brilliant piece of evolutionary design. Our brains release a powerful cocktail of chemicals, like dopamine for pleasure and oxytocin for bonding. This makes the act itself deeply rewarding, ensuring we're motivated to do it. But it’s more than just chemistry. It is the unique fusion of profound physical sensation with deep emotional intimacy and connection. That powerful combination is what truly makes it so pleasurable and fundamentally human.