Sexual function (sexual and reproductive health) is the integrated physiological, psychological, and relational capacity enabling individuals to engage in and experience sexual activity and response within the domain of sexual and reproductive health. As a fundamental component of sexual health and well-being, it represents the complex interplay of biological mechanisms, psychological states, and interpersonal factors that facilitate sexual expression and satisfaction. This concept is a critical area of investigation in research and clinical practice focused on understanding the determinants of healthy sexual life, identifying and addressing dysfunctions, and promoting overall sexual health across the lifespan.