You're missing one huge cause of male breasts:
Hormone (estrogen) mimicking plasticizers, used in plastics in use daily to make plastic bottles, (pthalates, bisphenol-A in the now no longer made Nalgene and alike bottles), plastic coatings inside of canned goods, among a lot of other places.
en.wikipedia.org/wiki/Endocrine_disruptor
There's way too many man-made pseudo-estrogens gong around; Go glass or stainless steel if you want to avoid many.
Recent comments
Posted to Attention Pot Smokers: You May Be Growing Man Boobs on 26 Jun 2011
Someone way up top mentioned a crapload of causes, was just adding another often-forgotten issue to the list.
Posted to Attention Pot Smokers: You May Be Growing Man Boobs on 26 Jun 2011