Human Sexuality: Essentials

abortion adolescence adults baby become birth control blood body boys breasts cancer cause cells cervix child chromosomes clitoris communication condom contraception contractions couple culture develop disease effects ejaculation embryo emotional erection erotic estrogen extramarital Fallopian tube fantasies fear feel female fertilization fetus genitals girls gland gonorrhea heterosexual homosexual Human Sexuality important individual infants infection involved Kinsey labia labia minora lives male marriage married masculine Masters and Johnson masturbation menstrual cycle moral mother muscle normal oral contraceptives organs orgasm ovaries ovulation pain parents partner penis percent person phase physical Pill pituitary pleasure pregnancy premarital problems progestin prostate prostitution puberty rape relationship reproductive result semen sensation sex hormones sex roles sexual activity sexual behavior sexual desire sexual dysfunctions sexual intercourse sexual response social sperm stimulation symptoms syphilis techniques testicles testosterone tion tive touch urethra usually uterus vagina woman women York