Free Anal Pleasure and Health: A Guide for Men, Women and Couples by Jack Morin Ph.d.

in the amazing perineal area between the scrotum (balls) and the anus.
    The clitoral body in women is much more complex and not clearly understood by most people. The visible parts of the clitoris include the glans (head) and shaft which are underneath the clitoral hood, formed by the uppermost tissues of the inner lips. But most of the clitoris is inside the body. It includes two large bulbs that surround the vagina, plus two thinner legs (crura in Latin) that flare out on each side of the bulbs. These two legs look something like a wishbone. Finally, a maze of tissue and blood vessels extends even further and lies just beneath the perineum, not far from the anus. Not surprisingly, it's called the perineal sponge. When a woman gets aroused, the entire clitoral body, inside and out, engorges with blood and becomes erect. While the clitoris increases in size quite dramatically, just like a penis, it doesn't become rigid.
     
    Notice also in Figure 2 that the a woman's urethra is surrounded by another kind of tissue called the urethral sponge. This spongy tissue also becomes engorged during high arousal. Within this sponge and the surrounding area are many tiny glands that produce a fluid similar to semen (no sperm, of course). The largest of these are called Skene'sglands, named after the physician who described them in the 19th century (Skene, 1880). Collectively, these glands are known as the paraurethralglands, and they appear to be the reason why some women, some of the time, can ejaculate fluid out of their urinary opening during orgasm.
    This seems most likely to happen when fairly intense stimulation is provided (by herself or a partner) in the area between the vagina and the urethra popularly called the G-spot (or "female prostate"). The G-spot can be massaged by inserting a finger (usually two) a few inches inside the vagina and pressing against the vaginal wall toward the front of the body. Some vibrators are equipped with a finger-like protrusion specifically for G-spot stimulation. Not every woman likes or responds to this kind of stimulation, and many don't ejaculate, at least not noticeably. Ultrasound studies suggest subtle anatomical differences between women who ejaculate and those who don't (Gravina, 2008), but there's so much yet to learn.
    Figure 2 also shows the location of the male prostate gland (sometimes called the "male G-spot") with the urethra and vas deferens (carrying sperm from the testicles) passing right through the center of it. The prostate is also somewhat erectile in that it enlarges and gets firmer during high arousal. Virtually all of a man's semen is produced by the prostate.* You can see that it's quite close to the rectum, so it can be easily stimulated through the rectal wall, just a few inches in.
    We'll return to these fascinating organs later. Our goal in this chapter is to understand and exercise all of the pelvic muscles, to keep them healthy, and to promote pleasure.

    EXPERIENCE
    IF YOU WANT to exercise your pelvic muscles productively, it's first necessary to locate them in your own body. The best way to do this is to sit comfortably and imagine that you're urinating (or actually do it). Then tighten the muscles you'd use to stop the flow of urine. The PC muscle is the specific one that does this. But all of your pelvic muscles tend to contract and relax in unison-just as they do during orgasm.
    Once you get a feel for the PC and other pelvic floor muscles, deliberately tense and relax them a few times while noticing exactly where in your pelvic area you feel the contractions. Place your fingers on your perineum-the area between your genitals and anus. You'll certainly feel the contractions there. Notice that your anus contracts simultaneously.
    Now that you've located the pelvic muscles, I suggest you try three different exercises. First, inhale deeply as you contract the muscles and hold them-and your breath-for a few moments. Then release your muscles as you exhale