Ok, does someone not know the vagina has an end?
He doesn't know the rectum has an end.
@gentle Google sigmoid colon. Your story of taking 15 inches are as believable as anything else you've typed.
People, you have access to the internet. You can learn up on any topic ya fancy. Take some time to learn your sexual anatomy. It will make sex better. And for the people intent on peddling fantasy, you will sound more convincing.