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Open Free for All / Re: Masturbation: 5 Things You Didn't Know
« on: January 09, 2012, 03:33:53 AM »
4. Certain forms of masturbation can lead to sexual dysfunction.

Experts warn that men who frequently stimulate themselves in ways that don't simulate sex with a partner -- for example, stroking very rapidly or with great pressure or friction -- can develop retarded ejaculation. That's a type of sexual dysfunction in which it is difficult or even impossible to climax during partnered sex. "Any man experiencing any sexual dysfunction should ask himself if he's masturbating in ways that produce sensations that differ from those he gets from his partner's hand, mouth, or vagina," says Michael A. Perelman, PhD, clinical associate professor of psychiatry, reproductive medicine, and urology at Weill Cornell Medical College in New York City and the president of the Society for Sex Therapy and Research "Then he should consider what he could say to her to make the stimulation more similar -- and how he could change the way he masturbates to make it feel more similar to what his partner does."
5. Masturbation may affect the risk for prostate cancer.

The relationship between masturbation and prostate cancer is a bit hazy.

A 2003 Australian study published in BJU International linked frequent ejaculation early in life with reduced risk for prostate cancer later on. But in a 2004 study published in The Journal of the American Medical Association, a researcher reported that "ejaculation frequency is not related to increased risk of prostate cancer." In both these studies, ejaculation frequency included sexual intercourse and masturbation.

In a later study published in BJU International, researchers found that frequent masturbation in young men raised the risk for prostate cancer but that frequent masturbation in older men lowered the risk. Sexual intercourse did not affect prostate cancer risk.

The researchers theorize that it may not be the masturbation itself which is increasing risk of prostate cancer in men who masturbate frequently in their 20s and 30s. Men who masturbate more may do so because they have high levels of male sex hormones -- and young men genetically predisposed to have hormone-sensitive prostate cancer will be at higher risk if they have more male hormones. In men over age 50, the researchers theorize, frequent masturbation helps drain the prostate of fluids that may contain cancer-causing substances.

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Open Free for All / Masturbation: 5 Things You Didn't Know
« on: January 09, 2012, 03:33:27 AM »
http://men.webmd.com/features/masturbat ... didnt-know

Ursus,

Stop moving the threads to the offa.


Experts talk about whether masturbation is safe, normal, or can lead to sexual dysfunction.
By David Freeman
WebMD Feature
Reviewed by Charles E. Jennings, MD

Experts say that just about every man who can masturbate does -- and why not? You don't need an expert to tell you that solo sex feels good, relieves stress, and is a terrific sleep aid. But here are five things you may not know about masturbation:

1. There's no such thing as "abnormal" masturbation.

Men often wonder if there's something abnormal about the way they masturbate. But experts are loath to offer specific definitions of "normal" and "abnormal," pointing out that men show great variations in both frequency and technique. "We humans are too diverse to establish a norm," says Betty Dodson, PhD, a New York City-based sexologist and the author of Sex for One. Every man masturbates in his own way, says Martha Cornog, the author of The Big Book of Masturbation, whether he "uses his hands, rubs against something, uses a sex toy or household object, wears special clothing, fantasizes, looks at a book or magazine, tries different positions, or looks in a mirror."
2. Masturbation is very safe -- but not entirely safe.

Unlike sex with a partner, masturbation can't give you a sexually transmitted disease. Nor will it subject you to the muscle strains, pokes in the eye, and awkward moments that can come with partner sex. But masturbation safety isn't guaranteed. "Masturbation is just about the safest sex there is," says Cornog. "But the laws of physics and biology don't stop operating just because someone is masturbating."

Frequent or overly vigorous masturbation can irritate the skin of the penis, as the average guy knows all too well. Less well known is that habitually masturbating face down -- for example, by thrusting against a sheet, pillow, or even a carpeted floor -- can injure the urethra in such a way that urine exits the penis not in a stream but in a hard-to-control spray. Barbara Bartlik, MD, a psychiatrist and sex therapist in New York City, says she's seen facedown masturbators with urethral trauma so severe that they are no longer able to use a urinal and must urinate while seated.

In certain extremely rare instances, masturbation and partner sex alike can cause penile fracture. This painful condition -- actually a tear in the tunica albuginea, the whitish tissue surrounding the penis's spongy layers -- occurs when an erect penis strikes a hard object or is forced downward. A medical emergency, it often necessitates surgery.
3. Solo sex can supercharge your sex life -- or scuttle it.

For various reasons, solo sex can be a real boon to sex with a partner. It helps teach men about their own sexual response -- what feels good to them and what doesn't -- so they will be better able to explain to their partners just how they like to be touched. It helps men learn to recognize the "moment of inevitability" just before orgasm and helps teach them how to avoid premature ejaculation. Perhaps most significant, it's a great coping mechanism for any man whose partner is temporarily unavailable for sex -- because of absence or illness -- or has a sex drive that doesn't quite match his own (something sex therapists call a disparity in frequency preference).

Of course, some men become so obsessed with solo sex that they begin to lose interest in having sex with their partner. The resulting hurt feelings and alienation a partner feels can make it hard to sustain the relationship. But experts are quick to point out that masturbation is perfectly OK even for men in a committed relationship. "We cannot assume that just because a man masturbates that there is a problem with his primary relationship," says Bartlik.

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Open Free for All / Things You Didn't Know About Your Penis
« on: January 09, 2012, 03:03:19 AM »
Things You Didn't Know About Your Penis

http://www.cbsnews.com/stories/2008/03/ ... 9777.shtml

(WebMD)  Here are some things you might have wondered about your penis, but were
afraid to ask.

No. 1: Your Penis Does Have a Mind of Its Own

You've probably noticed that your penis often does its own thing. You may remember times when it was completely inappropriate to have an erection; and yet you couldn't wish it away.

It's true that you have less command over your penis than body parts like your arms and legs. That's because the penis answers to a part of the nervous system that's not always under your conscious control. This is called the autonomic nervous system, which also regulates heart rate and blood pressure.

Sexual arousal usually isn't voluntary. The conscious mind is complicit in it, but a lot of sexual arousal goes on in the sympathetic nervous system. In addition, impulses from the brain during the REM phase of sleep cause erections, whether you're dreaming about sex or about a test you forgot to study for. Heavy lifting or straining to have a bowel movement can also produce an erection.

Just as the penis grows without your consent, sometimes it shrinks. "The flaccid penis varies in size considerably within a given man," says Drogo Montague, MD, a urologist at the Cleveland Clinic. Exposure to cold water or air makes your penis shrink. That's a function of the sympathetic nervous system.

Psychological stress also involves the sympathetic nervous system, and stress has the same effect as a cold shower, Montague says. When you're relaxed and feeling well, your flaccid penis looks bigger than when you're stressed out.

The penis is "kind of a barometer of the sympathetic nervous system," Montague says. So the greeting, "How's it hanging?" is more apt than you might have realized.

No. 2: Your Penis May Be a 'Grower' or a 'Show-er'

Among men, there is no consistent relationship between the size of the flaccid penis and its full erect length.

In one study of 80 men, researchers found that increases from flaccid to erect lengths ranged widely, from less than a quarter inch to 3.5 inches longer.

Whatever the clinical significance of these data may be, the locker-room significance is considerable. You can't assume that a dude with a big limp penis gets much bigger with an erection. And the guy whose penis looks tiny could surprise you with a big erection.

An analysis of more than thousand measurements taken by sex researcher Alfred Kinsey shows that shorter flaccid penises tend to gain about twice as much length as longer flaccid penises.

A penis that doesn't gain much length with an erection has become known as a "show-er," and a penis that gains a lot is said to be a "grower." These are not medical terms, and there aren't scientifically established thresholds for what's a show-er or a grower.

Kinsey's data suggest that most penises aren't extreme show-ers or growers. About 12 percent of penises gained one-third or less of their total length with an erection, and about 7 percent doubled in length when erect.

No. 3: Your Penis Is Shaped Like a Boomerang

Your penis is shaped like a boomerang. Just like you don't see all of a big oak tree above ground, you don't see the root of your penis tucked up inside your pelvis and attached to your pubic bone.

In an MRI picture, the penis looks distinctly boomerang-like, as noted by a French researcher who studied men and women having sex inside an MRI scanner.

One method of surgical "penis enlargement" is to cut the ligament that holds the root of the penis up inside the pelvis. This operation may give some men a little extra length if more of the penis protrudes from the body, but there are side effects. This ligament, called the suspensory ligament, makes an erection sturdy. With that ligament cut, the erect penis loses its upward angle and it wobbles at the base. The lack of sturdiness can lead to injury.

No. 4: You Can Break Your Penis

There is no "penis bone," but you can break your penis all the same. It's called penile fracture, and it's not a subtle injury. When it happens, there's "an audible pop or snap," Montague says. Then the penis turns black and blue. And there's terrible pain.

Penile fracture is rare, and it typically happens to younger men because their erections tend to be quite rigid.

Here's how to avoid penile fracture: don't use your penis too roughly. A common way that penile fracture happens, Montague says, is when a man is thrusting too hard and fast during sex, and slams into his partner's pubic bone. Also, a woman who moves wildly while on top of a man during sex can break a man's penis.

Peyronie's syndrome is a related condition that tends to show up more in older men, Montague says. An older man's erection may not be as rigid, but still is hard enough for sex. Over time, if the penis bends too much a certain way during sex, small tears in the tissue can form scars, and the accumulated scar tissue gives the penis an abnormally curved shape.

Not all penis curvature is a problem, however. "There is a lot of variability in what normal is," Cummings says.

No. 5: Most Penises in the World Are Uncut

A report by the World Health Organization (WHO) and the Joint United Nations Programme on HIV /AIDS (UNAIDS) estimates that worldwide only 30 percent of males aged 15 and up are circumcised.

Rates vary greatly depending upon religion and nationality. Almost all Jewish and Muslim males in the world have circumcised penises, and together they account for about 70 percent of all circumcised males globally.

The United States has the highest proportion of males circumcised for non-religious reasons. A whopping 75 percent of non-Jewish, non-Muslim American men are circumcised. Compare that to Canada, where only 30% are. In the U.K. it's 20 percent; in Australia it's merely 6 percent.

The practice of circumcising baby boys for medical and cosmetic reasons has become controversial in the U.S. But recently the World Health Organization (WHO) and the UUNAIDS recommended circumcision for adult men, based upon evidence that men with circumcised penises have a lower risk of being infected with HIV.

The CDC estimates that about 65 percent of all newborn boys get circumcised in the U.S.

By Martin Downs
Reviewed by Louise Chang
©2008 WebMD, Inc. All rights reserved

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The Troubled Teen Industry / .
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