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.
Scientists who conducted the study between October 2017 and last September believe they are the first to measure "orgasmic latency" - the gap between arousal and climax.