retract into the breasts. She may experience “sex flush,” a concentration of color over the chest. By now her inner labia have doubled in size from their resting state. The internal structures of the clitoris lift, drawing the external portion up and inward, so that it retracts from the surface of the body. The vagina itself “tents” around the cervix, open and wide deep inside the body. She experiences the involuntary muscle contraction known as myotonia, including carpopedal spasms (contraction of muscles in the hands and feet). She may begin to pant or hold her breath, as the thoracic and pelvic diaphragms contract in unison.
Orgasm. All the sphincters of her pelvic diaphragm (the “Kegel” muscle) contract in unison—urethra, vagina, and anus. She experiences rapid breathing, rapid heartbeat, and increased blood pressure. Her pelvis may rock, various muscle groups may tighten involuntarily. She experiences the