Why is it so common for Men to develop Gynecomastia? Is it in the pesticides that flow into our rivers?

Gynecomasia- Breast enlargement in males,sometimes starts in teen years. Can be caused by hereditary factors or as a result of taking certain prescription medications. Klinefelters Syndrome is just one example,there are many others.

I feel it is the high level of hormones in our food.

I do believe you've answered your own question.

I have slight Gynocomastia in my right breast. It sucks! Can't really notice unless I point it out but I was told it was becuase I have high testosterone levels which are balanced by increased estrogen production.

A common byproduct of household cleaners and chemicals is estrogen. Many studies on alligators and frogs show a definite link between infertility (feminization) of these species and chemicals in the water supply. It would be correct to assume similar effects are present in humans, but to a lesser degree (e.g. Gynecomastia).

if you can flex them they are not breasts!(flexes his pecs disturbingly)

fear my pectorals! flee before my undulating hairy man-nipples!

2 thoughts: hormones given to our meat supplies are passed on to us and marijuana use.

Additional info: Other medications can include certain antidepressants, drugs used to treat high blood pressure and tuberculosis, and some chemotherapy agents. Street drugs that may cause gynecomastia include marijuana, heroin and alcohol. Anabolic steroids can also stimulate male breast growth.

Common causes are:
...use of steroids
....over weight

If you use steroids, I would recommend you discontinue their use.

If you have a few extra pounds, you may want to loose some weight...I am a female and my breast are the first to go when I diet.

...also working the pectorals will replace breast fat with muscle and will make them look less feminine.