The sexual response cycle -- The research population -- Female extragenital response -- Female external genitalia -- The clitoris -- The vagina -- The artificial vagina -- The uterus -- The femaleorgasm -- Pregnancy and sexual response -- Male extragenital reactions -- The penis -- The scrotum and the testes -- The male orgasm (ejaculation) -- The aging female -- The aging male -- Similiarities in physiologic response -- Myotonia in sexual response -- Study-subject sexuality.