My boyfriend claims with extreme confidence that there is a muscle there (about 6-8in inside) and that pornstars are able to let things through (in reverse) during anal intercourse. I took an anatomy course though and don’t recall any such muscle….all that I know about are the internal and external anal sphincters, but those are both near the anus, not deep inside. Who’s correct, me or him?

Tagged with: • • • •

Filed under: Colon Anatomy