As the previous response stated, your condition is called erectile dysfunction which can be caused by many reasons. The basic mechanism of the problem is that the penis doesn't "hold on to" the blood and as it exits, the erection fails. Until you figure out what causes your ED and even after your diagnosis you might need a male enhancement aid. A safe one which has as its aim to enhance blood flow in your penis in a natural, non-chemical way is a ring you can find on www.peloop.com Look up the page and read more about how it works because I think it could help you.
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