Anuses are not designed for penises.

There is absolute concensus in the scientific community concerning the structure and function of the human alimentary and reproductive systems. These two systems are absolutely separate since the human does not possess a cloaca. Reproduction can occur only by utilizing the reproductive system, requiring both the female ovum (egg) and the male sperm. Ova are fertilized naturally in the fallopian tubes of women following sexual intercourse by the sperm which transits through the vagina and uterus following release from the penis. Although artificial methods are available and used, the anatomy and physiology of humans have resulted in a natural means for conception.

The anus and rectum, unlike the vagina contain no natural lubricating function. Thus insertion of unlubricated objects or inadequate dilation of the anus before insertion of a large object can result in tissue laceration. "The internal and external anal sphincters are elastic rings of muscle which generally remain tightly constricted except during defecation. The anal sphincters are also intended for material to pass through them in a direction that leads out of the body. When an attempt is made to insert something in the reverse direction, the muscles of the sphincter constrictw (Agnew,1986).

A study of sexually transmitted diseases in heterosexuals, bisexuals and homosexuals reported from Copenhagen in 1988 (Christopherson), demonstrated that the profile of diseases was strongly correlated to sexual life-style. tlAmoebiasis and giardiasis were found respectively in 31.9% and 13'.8% of homosexuals. None of the heterosexuals had pathologic protozoa... Among males with homosexual partners, 14% had rectal infections. Gonococcal and chlamydia1 infections were equally frequent. Three percent had symptomatic anorectal herpes simplex infection and 11% anal warts...Urethral gonorrhea and/or chlamydia infections were diagnosed in 39% of heterosexuals compared to only 10% of homosexuals and bisexuals. Twelve percent of the homosexuals had untreated early syphilis, whereas syphilis was exceptional among heterosexuals. The total burden of infections expressed as the actual number of infections was largest among homosexuals, 40.4%, 22.4%, and 5.3% having one, two, and three infections respectively."

o_0

I think I will stay far, far away from this entire board for the rest of my life.

moral of the story:  gays aren't natural.

Anuses (anii?) aren't designed in the first place lawl.

LAWL anii

>>3
Lies, you'll be back for more mindfuck.

aniimai?

Nothing is natural. If you want to give up buttsecks, then give up nuclear power. Give up selective breeding. Give up making metallic alloys. Give up plastic etc.

Anyway, 80% of the people on 4chan love traps.

STFU faggot

>>9
IT's not whether it's natural or not, it's whether it's beneficial or not. Surely homosexuals can stave off their urges long enough to suck on each other's schlongs instead of destroying each other's rectums and having their cocks seriously infected with all manner of STDs and posted on /b/?

>>11

so all people should only have consented sex in the missionary position and only in the period where the woman is ovulating and only with the purpose of having children. sure sounds like fun :3

>>12
That's not what I meant by beneficial. Beneficial also means pleasure. Anal sex gives perhaps slightly more pleasure to the couple, but does more pain than good in the long term.

>>12
Also I doubt your son wishes to have anal sex.

>>13

you ever heard of condoms? most sensible people use them these days.

>>1
So what? That's not going to stop people from having anal sex.

>>15
Using condoms does nothing to prevent rectums from prolapsing or distending.

>>16
Only the stupid ones.

>>15
Not approved by God. Even Coitus Intereptus is blasphemy. God wants many unwanted children who starved to death in paradise, hes funny that way.

>>13
You know that there are animals (mammals who lack cloaca) who practice anal sex? Even worse, some insects practice traumatic insemination, where they pierce the female with their razorsharp penis and then come in the wound. Since insects have open bloodsystems the sperms find their own way to the egg. Nature is not natural, nor beneficial in any way. http://en.wikipedia.org/wiki/Traumatic_insemination

And just by the way, how do you suppose heterosexuals transmit aids (if they dont practice anal sex of course)? Well, during coitus both the penis and the vagina suffers microtears and thus the blood of the participants are mixed. Yea, both anii and vaginaii can tear because of sex. And also check out the fascinating tear action happening while giving birth! Some women get one crack from clitoris to rectum! What the fuck god, how am i now not gonna stick it in her pooper?

Is there any proof of other animals besides humans who regularly engage in anal sex?

>>17

A rectum will only prolapse if you have porn sex, e.g. every porno ever. Normal sex will not harm it, if the right precautions are taken: lots of lube, condoms, lube, being gentle + loving etc.

>>21
It still does permanent damage which builds up over time and suddenly *SCHLOP* "OH GOD THE PAIN!!!1!".

>>1
Anuses are not evolved for penises.*

fix'd

>>22

not really.

>>22

gb2/biology.

>>24
Any day now.

>>25
I don't care how excited you get having a cock up your ass, don't you get the same feeling having one in your mouth? You're going to have to learn how to suck a mean dick unless you enjoy having a pink sock.

>>20
Yes, see trusty http://en.wikipedia.org/wiki/Non-human_animal_sexual_behavior for a plethora of links.

>>28

lol at link

Anal sex is an important method of reproduction in isolated white communities. Fistulas in women occur from birth in these small, southern towns and cities where family and race are regarded as matters of pride and exclusive sources for brides; This is mainly due to genetic defects caused by inbreeding (usually cousin-marriage, although closer pairings are also somewhat common). (Harper, 1999)

>>30
Darwin married his Christian cousin.  LOL at UK

Anal sex amongst black males is an important method of social interaction in self-isolated black communities. Fistulas in women occur from birth in these sprawling, poverty ridden stank holes in the inner cities where not knowing who your father is and race is regarded as matters of black pride and black culture; This is mainly due to genetic defects caused by having ancestors who did not evolve during the ice age (usually smaller thinking part of the brain and smaller penises). (Harper, 1999)

Bahh means no

>>21

I suppose having a small penis helps too, huh buddy?

Everything is natural. It all exists because it is part of the universe. We can't call something unnatural be cause we mane it, because we are natural. We may as well be called man made because we "make" ourselves.

Terminology is dumb and misleading.

In 1987, a young woman named Holly Ackerman was killed in a bizarre cult ritual. Now that you have read her name, she will come to you in the night and pay you a horrifying visit. You MUST do the following:

1. Watch the video "R.I.P. Holly Ackerman" here: http://www.youtube.com/watch?v=yIy2AymZywk

2. Post this message 3 times

R.I.P. Holly Ackerman