It's been a while since we've had the kind of provocative new claims about female orgasm that once issued from Kinsey or Masters and Johnson, so this is bound to generate a stir. Perhaps you've already heard something about the so-called GrÃ„fenberg or G spot--a small area on the anterior wall of the vagina which, the authors aver, is extremely sensitive to deep pressure; can produce multiple and extremely satisfying orgasms; and (since it ""includes a vestigial homologue of the male prostate"") is capable of ejaculating a small amount of prostatic-like fluid. This information was presented by the psychologist/sexologist authors at a 1980 meeting of The Society for the Scientific Study of Sex, though it is not entirely clear how much research preceded the announcement. The claim is that female orgasm exists on a continuum, with clitoral orgasm at one extreme and vaginal at the other, and most women having a ""blended"" experience that contains elements of both. Numerous testaments from women around the country are used to support the contention: often these are women who've been ejaculating for years and feared that they were actually urinating; or those whose G-spot orgasms are so strong, they find their ""bullet-shaped vibrators"" expelled ""like a missile."" The book's most mechanical section deals with identifying and strengthening the pelvic muscles, particularly the PC muscle which responds so well to the Kegel exercises. (But, it is noted, performing these exercises without a ""resistive device"" will only flex the muscle, not increase its size or strength.) This is not really thrilling reading: part history-of-advances-in-sexual-discovery, part technical anatomy course, part case-history results. But those anxious to find new buttons to press (as well as professionals who wish to keep up with the field) will probably flock to it nonetheless.