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In Monkey Sex, Screamers Win

Posted Dec 19, 07 6:29 PM CST in Science & Health 

(Newser) – Exploring why female monkeys shout so much during sex, researchers have found that the shouts actually help their partners to ejaculate, Live Science reports. Researchers from the German Primate Center looked at Barbary macaques and found that males ejaculated 59% of the times their partner yelled, and only 2% of the time that they didn’t. Females yell during 86% of all sexual encounters.

Hollering also leads to the sex being more vigorous—the researchers counted pelvic thrusts and timed them with shouting occurrence, and found that shouting increased thrusting. As Barbary macaques are very promiscuous, sperm levels in the male can get low, and the shouting, which the females do when they are most fertile, is a way for them to raise their chances of conception.

Source LiveScience

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In this photo released by China's Xinhua News Agency, a baby macaque is fed by its mother at a zoo in Suzhou, in east China's Jiangsu Province, Friday Nov. 23, 2007. (AP Photo/Xinhua, Wang Jianzhong)   (Associated Press)
A zookeeper, unseen, offers flower to a female Stump-Tailed Macaque, Dhundhun, on her 2nd Birthday in Gauhati, India, Tuesday, July 3, 2007. The Assam State Zoo authority celebrated the day as the Stump-Tailed...   (Associated Press)
Nickel, a wild rhesus macaque monkey, was captured last month, now lives in a chain-link cage at Amazing Exotics in Umatilla.   (KRT Photos)
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