That’s usually because they’re not getting enough blood flow to the penis, which could be the result of being overweight, smoking, increased cholesterol, high blood pressure, diabetes, or cardiovascular disease. So the first step in your penis-growing experiment should be to get the rest of your body healthy — especially your cardiovascular system. “What’s good for the heart is good for the penis,” says Fisch.

The vacuum pump. This is a cylinder that sucks out air. You stick your penis in and the resulting vacuum draws extra blood into it, making it erect and a little bigger. You then clamp off the penis with a tight ring -- like a tourniquet -- to keep the blood from leaking back into your body. What are the drawbacks? The effect only lasts as long as you have the ring on. Using it for more than 20 to 30 minutes can cause tissue damage. This is sometimes used as a treatment for erectile dysfunction, but has not been proven to actually increase the size of the penis.
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