This document discusses human sexuality from various perspectives. It covers how sexuality has been a focus of interest throughout history in art, literature, and today online. Sexual behavior is influenced by relationships, culture, personality and biology. Sexuality encompasses thoughts, feelings and behaviors related to sexual gratification and reproduction. It plays a central role in most people's lives through intimate relationships and family formation, and can also be a source of problems. The reasons to study human sexuality are to understand personal and social issues related to it. Sexuality is deeply intertwined with personality. Both normal and abnormal sexuality are discussed.