The average time for a woman to climax has been revealed. It took Meg Ryan less than a minute to fake it in When Harry Met Sally, but a new study has found that on average it takes women 13 minutes and 25 seconds to have a real orgasm. In research that might have taken the passion out of the moment, women were asked to start a stopwatch when they became sexually aroused, and stop it again when they climaxed. Around one in six of those who took part said they never climaxed during intercourse. Of the rest, the time it took ranged from 5 minutes 42 seconds to just over 21 minutes. Almost nine in ten of those who took part in the research reported longer-lasting sensations when they were positioned on top.
The duration of the orgasm was obtained using the subject's verbal indication of its start and finish. The estimated duration and the subjective experience of the orgasm self-graded on a 5-point scale were also obtained in a number of subjects. Vaginal blood flow was assessed by the power consumption needed to keep a heated oxygen electrode, held on the vaginal wall by suction, at a constant temperature. The mean measured orgasm duration was For 14 subjects, their estimate of the duration of their orgasms
They are usually associated with involuntary actions, including muscular spasms in multiple areas of the body, a general euphoric sensation and, frequently, body movements and vocalizations. Human orgasms usually result from physical sexual stimulation of the penis in males typically accompanying ejaculation and of the clitoris in females. The health effects surrounding the human orgasm are diverse. There are many physiological responses during sexual activity, including a relaxed state created by prolactin, as well as changes in the central nervous system such as a temporary decrease in the metabolic activity of large parts of the cerebral cortex while there is no change or increased metabolic activity in the limbic i. These effects affect cultural views of orgasm, such as the beliefs that orgasm and the frequency or consistency of it are either important or irrelevant for satisfaction in a sexual relationship,  and theories about the biological and evolutionary functions of orgasm.