Dr. Eowyn has written about the many consequences of anal sex. For instance:
- The simple truth is this: The human body was not designed to accommodate anal intercourse. The anus is a delicate mechanism of small muscles that comprise an “exit-only” passage. With repeated trauma, friction and stretching, the sphincter loses its tone and its ability to maintain a tight seal.
- Anal intercourse leads to leakage of fecal material that can easily become chronic.
- The intestine has only a single layer of cells separating it from blood. Therefore, any organisms that are introduced into the rectum have a much easier time establishing a foothold for infection than they would in a vagina. The single layer tissue cannot withstand the friction associated with penile penetration, resulting in traumas that expose both participants to blood, organisms in feces, and a mixing of bodily fluids.
- Ejaculate has components that are immunosuppressive
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