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Know your arse for better sex
Know your arse for better sex !!!External sphincterThe external sphincter is a muscle that holds the anal canal in shape. It stops you from shitting when you don't want to and can stop things from getting up your arse too. There are lots of nerves within your external sphincter so it can feel sensations of hot and cold, expansion and touch. This muscle is controlled by the central nervous system, the same system that controls the voluntary movement of our fingers and toes, etc. This means that...