We have aleady covered how Pomegranate Juice Boosts Erectile Strength, but did you know that a study on rats showed it giving a nice boost to testosterone?  So put down the beer and tequila and start slamming down some pomegranate. Seriously, what other beverage will make your hormones and your penis stand at attention?
Another good sign is that sperm motility (movement) and concentration were increased as well. In other words, both fertility and hormones were helped.
CAUTION: Talk to your doctor if you are on any medications. Pomegranate juice is so powerful that it can definitely interact with certain medications negatively. In addition, there are three reported cases of priapism occurring in men simultaneously taking Viagra.  Again, pomegranate juice is very powerful. In addition, please read my link on The Potential Side Effects of Pomegranate Juice : there was an animal study showing it increase the risk of Parkinson's.
So how pomegranate juice would you have to consume? Well, the rats were given small, medium and/or large amounts of pomegranate juice. A large amount of juice was 1 ml.  Now if the typical rat is 400 mg, that translates to 182 ml or 6 ounces for an adult 160-lb male. Now I'm not a researcher and don't know if a one-to-one ratio is most appropriate, but assuming that is the case, 6 ounces of pomegranate juice is entirely reasonable.
Will just 6 oz. per day of pomegranate juice give a male a nice increase in testosterone? We don't know the answer to that question. But remember that pomegranate juice has huge cardiovascular benefits anyway: decreased inflammation, lowered cholesterol, plaque removal - the list goes on and on. And who knows? Maybe your T will head north at the same time.
1) Clin Nutr, 2008 Apr, 27(2):289-96, Epub 2008 Jan 28, "Effects of pomegranate juice consumption on sperm quality, spermatogenic cell density, antioxidant activity and testosterone level in male rats"