Sphincter
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− | A '''sphincter''' is a ring of muscles inside the body that surrounds an internal or external opening and may close the opening by contraction. In a [[BDSM]] context, it usually refers to the [[anus|anal | + | A '''sphincter''' is a ring of muscles inside the body that surrounds an internal or external opening and may close the opening by contraction. In a [[BDSM]] context, it usually refers to the [[anus|anal]] sphincter. |
[[Category:Health]] | [[Category:Health]] |
Revision as of 17:15, 13 August 2012
A sphincter is a ring of muscles inside the body that surrounds an internal or external opening and may close the opening by contraction. In a BDSM context, it usually refers to the anal sphincter.