Experts wondered the same thing. In the study, they asked 71 sexually active heterosexual women between ages 18 and 48 for more details about vocalization during sex. The researchers found that many of the women did make noise, but not necessarily while they were having an orgasm. Are female orgasms really just a 'bonus'? So it would be a fairly wise faking strategy to moan since men already tend to associate moaning with orgasm. Research in the animal kingdom reveals that female baboons, for example, have a variety of copulation calls, which appear to relate to their fertility: The vocalizations tend to become more complex when the females are closer to ovulation, and also vary when a female is mating with a higher-ranked male baboon.
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