Sexual behavior goes far beyond “physical” sex. A cursory look at the history of human sexuality shows that patterns of sexual behavior and morality have taken may diverse forms over the centuries. Sexual function is discussed: cultural variations, sexuality as a system, sexual behavior, human sexual response, sexual dysfunction, impotence, premature ejaculation, ejaculatory incompetence, paradoxical orgasm, relationship problems, infidelity, nontraditional relationships, and forms of treatment in sex-oriented therapy (76 pp.)