Sex toys, including objects for rectal insertion, should not be Some objects can become lodged above the lower colon.
Background: Normal anal vein-containing-cushions are located in the wall of the rectum and anus and may become enlarged symptomatically and displaced to.
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Personal lubricant is essential for anal masturbation. Neither the anus nor the rectum produce their own lubrication, and tissue inside the anus.
Amazon.com: Utimi Emulational Anal Sex Masturbation Cup for Male experience with the emulational anus, easy holding and special convex particles inside.