Oh I will keep reading them. They have actual information based on...studies, tests, and real data.
No I've never seen gynecomastia attributed to any of those specifically, but I did see the marijuana references in no less than 3 of my books, which is why I remembered it. That and because I had never before heard that weed can cause that.
The argument can't be made? That's funny. Idiotic and funny. But hey, go take it up with the people who did the research. I don't give a **** either way. I simply reported what I learned so people could make the best decision for themselves. Where did you get your information, Google? Wikipedia? Keep being a major PoS to others just for trying to help. I'm sure you'll get real far in life that way.
Here's a link for you, since there's no point in citing my books to you.
http://www.cfp.ca/cgi/content/full/56/4/344??