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Originally Posted by Helm
particularily, only the shared 'wall' of the vaginal and rectal cavity share the same nerves. However, the whole area is laced with sensitive nerve endings. But so is the sole of one's foot. Not all of them are herotogenous, all I'm saying.
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if that was strictly true only stimulation of the anterior rectal wall would cause sexual response.
http://anatomy.uams.edu/anatomyhtml/...&perineum.html
the bulbocavernosus and ischiocavernosus muscles are served by the perineal branch of the pudendal nerve as are the internal and external anal sphincters. this is why people's assholes clench when they're cumming.
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