Penis pumps and vacuums are popularly used as sexual aids to promote erections in men. They are also used by some with the intent of increasing penis size. These devices are placed over the penis (and sometimes the scrotum) and use suction to engorge the penis with blood. If used consistently over a long period of time, they can cause the skin of the penis to become "spongy" and have a thicker appearance.
Another option for an “emergency” short term size increase is simply having a warm bath, a shower, wrapping your penis with a wet and warm towel or simply pulling it by hand. The blood flow increases and the flaccid size increases, too. The effect only lasts for minutes, but there are situations this may become handy, especially if you were in a cold environment before and your penis size has “shrunk” to even smaller than usual.
Ligament release will immediately make you look about one-half to one inch longer, but it can also change the angle of your erections so the penis doesn’t rise, but elongates while pointing straight down. Between that and the risk of erectile dysfunction, it’s no surprise that many men find this option unappealing. If this is not a compromise you want to make, it’s wise to avoid this procedure.

Lose belly fat. Your penis may look smaller than it really is if it's partially obscured by skin that droops over the top. Losing belly fat is no simple task, but it can make a big difference when it comes to the perceived size of your penis. Start taking measures to lose weight and you'll likely see improvement in other areas as well. According to a report from Harvard, men with a 42-inch waist are 50 percent more likely to have erectile dysfunction (ED) than men with a 32-inch waist.[9]
Ready to try it for yourself? Here's how to do it: Squeeze the muscles that you would use to stop the stream of urine and hold the contraction for 1 to 2 seconds (concentrate on only using your pelvic muscles, and not your glutes, thigh, or hip muscles). Release. Repeat 30 times, resting one minute when you're finished. Perform 3 sets, 3 to 4 times a week. 
Being fit and at a healthy weight has a lot to do with how a penis appears and performs (more on that soon) but it also has a lot to do with what we eat. For example, foods like onions are said to increase healthy blood flow and circulation — including to the penis! Salmon is known for this as well, and so are bananas (we’re trying not to make a pun here) and dark chocolate. Also, foods high in protein (say, like eggs or low Greek yogurt) and proper hydration can only work in your favor.
Look into taking maca supplements. This powder is known for being an aphrodisiac. It contains the photochemicals macamides and macaenes, which are said to boost energy and help men maintain erections. Because no conclusive scientific studies have been conducted on this substance, it's best to proceed with caution. Be sure to discuss it with your doctor before you start adding this supplement to your daily routine.
Stretching with weights. Weights or stretching exercises won't bulk up your penis -- it's not a muscle. But hanging weights off your flaccid penis may stretch it a bit, O'Leary says. The catch is that it requires a freakish degree of dedication. "You might have to wear a weight strapped to your penis eight hours a day for six months," says O'Leary. At the end of it, you could be lucky enough to gain about half an inch. Risks include tearing of the tissue, burst blood vessels, and other problems.
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