Intimacy gets talked about like it’s either pure emotion or pure instinct, but the truth is a lot more complex — and far more interesting. Researchers have spent decades studying what happens in the body during close physical connection, and the findings are surprisingly consistent. Whether you’ve been with someone for years or you’re just starting something new, the way intimacy affects your health goes deeper than most people realize. It’s biology, psychology, and chemistry all working together to shape how we bond, how we trust, and how we heal.