The study of sexual human behavior is called sexology. It encompasses a wide range of topics, such as sexual orientation, sexual health, reproductive anatomy, sexual psychology, and sexual attitudes and behaviors. Sexology aims to understand and improve human sexual experiences and relationships.

Sigmund Freud, the founder of psychoanalysis, believed that human behavior is strongly influenced by unconscious sexual and aggressive drives. He proposed that these unconscious forces motivate much of human behavior.

Alfred Kinsey, an American biologist and sexologist, published a groundbreaking study in 1948 titled "Sexual Behavior in the Human Male," followed by "Sexual Behavior in the Human Female" in 1953. His research provided pioneering insights into human sexuality during the postwar period.

Dr. Kinsey's report, titled "Sexual Behavior in the Human Male" and "Sexual Behavior in the Human Female," was groundbreaking as it provided a comprehensive and scientific study of human sexuality. It helped challenge misconceptions and stigma surrounding sex, promoted dialogue about sexual behavior, and paved the way for further research and discussions on human sexuality.

Human Sexuality can be defined/determined by different things: Sex in biology, gender identity, sexual orientation, animal sexual behavior, and plant sexuality.

Sex is generally the ACT of sex.