American Journal of Public Health. Premature ejaculation is likely to be caused by a combination of psychological factors such as guilt or anxiety, and biological factors such as hormone levels or nerve damage. Retrieved from http: A single, overarching explanation of the orgasm does not currently exist.
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Retrieved from https: A comprehensive analysis of 33 studies over 80 years found that during vaginal intercourse just 25 percent of women consistently experience an orgasm, about half of women sometimes have an orgasm, 20 percent seldom or ever have orgasms, and about 5 percent never have orgasms. To see if this sex session is on track for multiple orgasms, here's a rule of thumb: Fast facts on orgasms Orgasms have multiple potential health benefits due to the hormones and other chemicals that are released by the body during an orgasm.