Scientists have developed an injection to treat men suffering from erectile dysfunction, the Sun reports. In fact, it could be so groundbreaking that they even reckon it might also make penises bigger.
The treatment involves injecting 20m stem cells into the base of the penis, re-invigorating the nerves and blood vessels.
According to the Sunday Times, the research was initially carried out in relation to men who had suffered from prostate cancer, and who had to have their prostate glands removed as the result - in turn causing degeneration of the nerves and blood vessels, making the penis also shrink.
Professor Soren Sheikh, director of the Danish Centre for Regenerative Medicine, will reportedly reveal more about the treatment at a meeting for European society for Human Reproduction and Embryology in Barcelona in July.
Sheikh said: "Stem cell injections can restore full function.
"These trials look good but there is still a way to go."
Sheikh added that men's regained function had lasted more than a year so far, but there was more work to do.
The treatment is thought to hold the potential to cure millions of men with erectile dysfunction, and could end the need for men to use viagra - with the Sexual Advice Association estimating that millions of men have erectile dysfunction.
Meanwhile, there are a number of things you can do to help maintain a happy penis.
One of those, as you may have suspected, is to stop smoking. There are various toxins in a cigarette that can damage the blood vessels in your penis, according to Medical News Today, which could mean the muscle cells down there could waste away - and, in turn, erections could become difficult.
A 1998 study by experts from Boston University of Medicine also revealed similar results, examining the penises of 200 men and finding that smokers' members were shorter than those who don't smoke.
They concluded that smoking inhibits blood flow to your penis, making it difficult for it to stretch.
As well as smoking, medication could also have an effect on the size of your penis - including drugs like Adderall (often prescribed to people with attention deficit disorders) and some antidepressants and antipsychotics.
Some drugs used to treat prostate problems could also have an effect, with a 2012 study into a drug called finasteride revealing that men suffered from shrinkage and reduced sensation, and another published in the journal Urology finding that 41 percent of those taking the drug dutasteride suffered sexual dysfunction.
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