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The researchers wrote: "It took years, a lobby, undesired publicity, and a godsend (two tablets of sildenafil 25 mg) to obtain our images. The BMJ Images from experiment nine shows the sexual response of a woman who had a child. The penis can be seen forming a boomerang shape. An image published in The BMJ showing the anatomy of sexual intercourse in experiment 12. When the women were aroused, their uteri appeared to raise and their vaginal walls lengthened. The team found that while having sex in the missionary position, the penis became boomerang-shaped, and a third of its length consisted of the root of the penis.
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"And as amateur street acrobats they are trained and used to performing under stress." The authors wrote: "The reason might be that they were the only participants in the real sense: involved in the research right from the beginning because of their scientific curiosity, knowledge of the body, and artistic commitment. Only one couple was able to have sex without Viagra. The men had more problems with sexual performance than the women, according to the researchers, and some took sildenafil-more commonly as Viagra-in order to maintain an erection. 20 minutes after the women achieved orgasm, researchers took the final image. The women let the researchers know when they were pre-orgasm, so they could snap an image. After this, the men were asked to leave and the women instructed to bring themselves to climax. Then the men were asked to enter the room and have sex in the missionary position. The MRI scanner was positioned in a room next to a control room where researchers sat, with a curtain covering the window and the participants' modesty.įirst, the women had their pelvises scanned while lying on their backs. Once they had found enough volunteers and gained their consent, the researchers asked them to visit a university hospital in the Netherlands.
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Presumably in order to ensure they could fit inside the snug MRI scanner tube, the volunteers were required to have small-to average weight and height.
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Researchers recruited the participants "by personal invitation," they wrote in the study, and through a local scientific TV show. Three couples had sex twice, and the single women achieved orgasm without a partner, according to the study. It Also Helps With ReproductionĮight couples-including one pairing who were amateur street acrobats-and three single women took part in the study, which involved 13 experiments. Clitoris Isn't Just for Female Pleasure.Don't Ditch Birth Control Pill Over Unpublished Research, Experts Warn.