Jensen goes a step farther than Lieberman and Peck (KR, p. 649, J-225) in his acceptance of teenage sexual activity and in the frankness of his photographs, especially one of the female genitalia. Pointing out that ""most books on sex cloak the issue in talk about morals and love. . . and marriage,"" he offers in their place a ""straightforward, uncluttered, factual book"" while admitting that his own values cannot be entirely left out. Those values are indicated (but never obtrusive) in the assertion that ""most normal sex is accompanied by tender and loving feelings"" between people who have ""a very special attraction for and closeness with one another"" and that ""most experts on sex, psychology and psychiatry"" do consider homosexuality ""not normal,"" as well as in the ""several strong arguments"" he makes against virginity. Misconceptions purveyed by other ""liberal"" sex books are gratifyingly laid to rest: Jensen assures readers that ""you cannot masturbate too much,"" that pregnancy without penetration is ""exceedingly unlikely,"" and that many of their other worries about breast or penis size, technical inexperience, etc., are normal but groundless. Above all Jensen insists that ""wise girls plan ahead,"" and his permissive attitude toward early intercourse is balanced throughout by cautionary advice about contraception. A glossary of technical terms with their slang equivalents is included, and addresses for information on contraception, abortion, and VD appended.