In males and females, orgasm is characterized by a peak in sexual pleasure that is accompanied by rhythmic contractions of the genital and reproductive organs, cardiovascular and respiratory changes, and a release of sexual tension. In males, orgasm generally occurs in two stages: emission, which refers to rhythmic muscular contractions that force semen into the ejaculatory ducts, and expulsion, which is the release of semen through the urethra (ejaculation). Unlike males, some females (approximately 15%) are able to experience multiple orgasms, and some women experience orgasm and perhaps ejaculation when the Grafenberg spot, an area along the anterior wall of the vagina, is stimulated. Contrary to Freud's assertion of two distinct types of orgasm in females, clitoral (the "infantile" orgasm) and vaginal (the "mature" orgasm), Masters and Johnson (1966) found no physiological differences in orgasm produced by vaginal versus clitoral stimulation. Other researchers note that intensity of orgasm and emotional satisfaction can differ dependent upon type of stimulation.
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How to increase your staying power to extend your pleasure-and hers. There are many techniques, exercises and even devices, aids, and drugs to help you last longer in the bedroom. However, in most cases, the main reason most guys don't last long is due to what's going on in their minds, not their bodies.