A new review in the journal Urology found that strengthening a man's pelvic floor—the muscles that surround the base of your penis and form a shelf across the bottom of your pelvis—can help diminish erectile dysfunction and premature ejaculation. How so? When you get hard, your pelvic muscles keep blood in your shaft. This helps to enhance and maintain your rigidity, says urological surgeon Andrew Siegel, M.D., the study's author and creator of pelvic floor exercise DVD Private Gym. And for premature ejaculators, squeezing those muscles can delay your orgasm. The stronger these muscles, the better the effect, Dr. Siegel says. 
A fairly common way for surgeons to add volume in such areas of the body as the face and butt, fat grafting is also an option for the penis. Dr. Tim Neavin, a plastic surgeon in Beverly Hills, California, says that some surgeons have been doing penile fat transfer (also called composite augmentation phalloplasty) for decades. In this technique, a surgeon takes fat from the belly or inner thighs and injects it into the penis to increase girth.
There’s not much evidence that the food you eat can actually change the size of your penis. However, eating a healthy diet can improve blood flow, helping you achieve bigger erections. Losing belly fat can also help your penis look bigger. Stick to a diet rich in fruits, vegetables, and lean proteins. Avoid lots of high-fat foods, like cheese or fatty meat.
Consider ginkgo biloba. This herb is often taken to boost memory, but it also help with blood circulation and may enhance blood flow to the penis. According to a study conducted at the University of California, ginkgo is most effective at helping men on anti-depressants that can lead to sexual dysfunction. Another study found that gingko had no effect. Scientific data is inconclusive, but since gingko enhances memory and has relatively few side effects, it might be worth a try.
However, after more than a century of generally dubious and sometimes lunatic penis enlargement attempts, there's still not much you can do. Sure, there are lots and lots of supposed options out there -- penis pills, creams, brutal stretching exercises, horrific-looking devices, and penis surgery. Almost none of it works. The few approaches that can work often have modest benefits and serious side effects. How serious? In some cases, erectile dysfunction-serious.
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