Was the anus designed for anal sex?

This is a comment I received a while back in response to the "Exit Only" post.  I thought the question interesting enough that I wanted to post it, and my response on the main page.

AnonymousJune 23, 2014 at 4:06 AM

I've found this blog, and this page in particular very interesting. Do you consider that there could be some element of design or purpose to the fit of the anus to the penis or is this just a fortunate accident? Whatever, it's reassuring to think that I'm not entirely alone in thinking along these lines. The doesn't appear to be a persuasive logical alternative, when you consider the many gynecological disorders experienced by women and the fact that the vagina actually only need to be used a very limited amount of times in order to fulfill its function. And on the other hand you have all these couples who attest that anal provides the greater pleasure for them. Why all the desire and interest if it is not a natural function? I'd love for you to explore this in another post and see if others share this view as I feel you only hinted at the possibility here.

luvmywifesassMarch 11, 2017 at 3:10 AM
I think the function of the anus and rectum, that of retaining feces until such a time as it is to be expelled, are what make it better suited for frequent pleasurable sexual activity. The thicker, stronger muscle band around the anus cause it to be tighter, providing more stimulation, and to remain tight. Whereas the weaker, thinner muscle band of the vagina loses elasticity quickly, especially if a woman gives birth. Of course this is a common complaint of couples who practice vaginal sex.

The rectal valves, and their ability to move closer to the anus allow them to be pushed down onto the man's cock. When done correctly, it feels similar to the most exquisite oral sex. In my experience with my wife, I think this is involuntary and happens just before and during orgasm. This stimulation is something the vagina cannot compare to and causes the man to experience more complete ejaculation.

Speaking of more complete ejaculation, as I mentioned in the post, the rectum, being open ended also allows more complete ejaculation, as it allows the free flow of ejaculate beyond the rectal valves and into the woman's colon. The rectal valves then close as the man withdraws his cock, retaining his cum within her colon, where the beneficial compounds are best able be absorbed. Anal sex is far superior to the vagina in this regard, as the ejaculate is better retained and the colon provides for better absorption than the vagina.

So, I don't know if the anus evolved (or was designed by a creator) for the purpose of more pleasurable sex that also enhances bonding more than that of vaginal sex. All I know is it unquestionably does.

Exit Only?

In response to the last post I received the following:

"It's an exit not an entrance. His wife is obviously suffering enough without making her do something painful and unnatural. Many people have discovered to their cost too late how harmful this activity can be, you only have to speak to any doctor about it.  This woman needs counselling and support not abuse."

Oh please, many women find anal sex a pleasurable alternative to vaginal when health issues cause vaginal sex to be uncomfortable.

As far as the, "It's an exit" argument, what is there about the design of the anus and rectum that makes one assume this?  To the contrary, if you look at the below illustration, which is shaped more like a penis, the vagina or the rectum?  Which one is open ended and looks like it could accommodate a larger penis?  The vagina is closed ended.  It can be uncomfortable or even painful for a woman if a man hits the back wall of her vagina during intercourse.  If a man ejaculates while the head of his penis is against the wall of the vagina, it can be difficult to ejaculate fully.  He may even experience a retrograde ejaculation, where semen is forced into the urinary tract.  As the rectum is open ended, the man can penetrate the woman fully and experience complete ejaculation.  As well, as the rectum is tighter, the woman can feel each surge of the man as he ejaculates.


As my wife and I have been having anal sex for nearly 22 years, I'm just wondering when this harm will come to her?

Anal Sex Q & A

I sometimes receive e-mail regarding anal sex. I try to answer each and every e-mail I receive. I thought I would post a few of the questions I've received, and my answers. Please, send me your anal sex related questions, and I'll try to answer them here.

Q. Anal sex isn't natural, is it?

A. What defines natural, pro-creation? By that standard only vaginal sex would be considered "natural." How many who make this statement in reference to anal sex, have oral sex? In my opinion, what is natural is that which can be done without harm. For example, smoking cigarettes might be considered not "natural." Anal sex meets this criteria for naturalness.

Q. The rectum wasn't designed for anal sex, was it?

A. I would like to address some of the more common myths surrounding anal sex. The anus opens and closes many thousands of times during a person's lifetime. This is it's function. My next statement is not meant to be crude, I'm just illustrating a point. Taking into account the average sized bowel movement is approximately the same size as the average sized penis, why wouldn't the rectum accommodate a penis? Some say, the rectum is only for waste removal; some sort of one-way valve. However, there is nothing about it's design that supports that theory. The Sphincter muscles can be controlled to allow the insertion of an object, just as they are controlled to allow the removal of one.

Q. I've read that the lining of the vagina is tough and stretches, while the lining of the rectum is fragile and tears easily, is this true?

A. The wall of the of the vagina is tough. It was designed to stretch to allow the passage of a baby. The rectum, on the other hand, only needs to stretch to accommodate something the size of a bowel movement, or a penis. As to the fragility of the rectal wall and whether it tears easily or not, all you have to do is eat a lot of peanuts to realize the lining can't be that fragile, as it feels like a razor blades when you have a bowel movement. Now, I'm not going to say the rectal lining isn't going to tear if you cram a baseball bat in there and work it vigorously. However, after 16 years of (often vigorous) anal sex with my wife, she has never experienced bleeding, tearing, or discomfort as a result of anal sex; and my penis is larger than average. Certainly, millions of people have anal sex every day without harm.

Q. Will anal sex cause the anus stretch and cause incontinence?

A. Once again, the anus was designed to open and close hundreds of thousands of times over a lifetime. I have never seen a documented case of penile/anal sex causing incontinence. Certainly, if you are going to shove that ol' baseball bat in there, you might expect to have some problems. Although I have seen post by doctors who say it may cause these problems, I have seen many more that say it will not. As well, I have never seen a post by a specialist, say a proctologist, who says penile/anal penetration will cause this type of damage. The simple fact of the matter is, the anus was designed to accommodate something the size of a penis.

Q. I heard anal sex causes rectal/colon cancer?

A. This is a possibility if the male is infected with the Human papilloma Virus (HPV). If so, you would also be at risk of receiving cervical cancer from having vaginal sex with that partner. Many doctors now recommend all girls 14 and over get immunized against HPV. HPV is a sexually transmitted disease, but not in the traditional sense, and may not show up in some STD screenings.

Q. Is it safe to cum in her ass?

A. Barring STDs, there is no danger in unloading in her ass. I've cum in my wife's ass thousands of times.

Q. Isn't anal sex is prohibited by God/the Bible/the Koran/Etc?

A. I'm not a theologian, go ask your pastor, rabbi, priest, etc. I'm only addressing the physical/psychological aspects of anal sex.

Q. If I want to have anal sex with my wife/girlfriend, does that mean I'm gay or bi-sexual?

A. Simply put, no. You are only gay or bi-sexual if you want to have sex with another man.

Q. What if I enjoy it when my wife/girlfriend stimulates me anally, am I gay or bi-sexual?

A. Although this isn't my thing, the same answer holds true: You are only gay or bi-sexual if you want to have sex with another man.