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?