Eat watermelon. It's not an herb, but it has properties that might help increase the size and duration of erections in a similar way arginine. Watermelon contains an amino acid called citrulline, which gets converted into arginine and leads to the dilation of blood vessels. The fact that watermelon contains citrulline is a relatively new finding, so no studies have been conducted to find out how well it really works or how much watermelon you'd have to eat to see the benefits. However, since watermelon is considered a superfood when it comes to men's health, you can't go wrong by eating plenty of it while it's in season.
Even technology is offering some help, let’s call it digital male enhancement, although some people may qualify it as cheating: An android app called “RetouchMe” is offering retouching services for your face and body and explicitly includes an option to virtually get a bigger dick. Sample photos only include dressed men with a big bulge in their pants, a bit silly in my opinion, but judge yourself. Use at your own risk and always remember, making promises you can’t keep on Tinder, Instagram or your favourite dating site may result in disappointed women and that’s not what real enlargement is about.
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.