They may well have male friends who have developed breasts but incidentally drink soymilk. Chronic drinking (of alcohol!) leads to decreased liver function and higher levels of estrogen. I forget the specific thingy-majig involved, but the liver produces something (enzyme?) that destroys estrogen, and when it can't produce as much, males become "feminized" - fat distribution changes, including the possibility of developing breasts, and voice pitch can even change.

I've known many male vegans, and none with boobies. All I know are quite thin to boot (so I'd notice the boobs if they were there!). My boyfriend has been drinking soymilk for... 6 years, and has not had an increase in boob-age. But, I think it would be worth more if a guy were a soymilk drinker throughout developmental years when secondary sex characteristics become more pronounced to have a verdict (though I really, really doubt that it would have any feminizing effects. Also, my boyfriend had been drinking it ages 15-21, but I think it would have to be younger boys if there is in fact any effect).

P doesn't have boobs. The end.

This old thing again?  ::) From what I hear, there are so many soy-derivatives in processed US foods anyway, I don't think soymilk/tofu would make much difference. If a guy's got moobs, I'd be more likely to ask how much excess poundage he's carrying in the first place. The only real moobs I've seen have been on guys who were seriously overweight.

As for soy=moobs, I think that's an urban legend. How many Japanese men are there out there that have them, not counting sumo wrestlers of course? Not too many.

From what I hear, there are so many soy-derivatives in processed US foods anyway, I don't think soymilk/tofu would make much difference.

This.  Soy is in everything anyway.  People don't realize that. 

::)

Not associated with soy, but there was this huge billboard on a busy street here for a while, and I LOVED it. It was just a huge white board, with MISSOULANOMOREMANBOOBS.COM in black.  ;D

To clarify about the soy estrogens: they are WEAK plant estrogens. Mammalian estrogen (like what gets secreted into cows' milk) acts much more strongly on human estrogen receptors  than those in soy do.

But, male-bodied people still have estrogen in their bodies - male sex hormones like testosterone can't cross the blood-brain barrier to act on the brain, so it gets converted to estrogen. So when people make reference to things like the Weston A Price foundation, which claims soy is to blame for men being gay, developing breasts etc. I can't help but laugh...any doctor should know that men already have estrogen in their bodies (and obviously that estrogen doesn't determine one's sexual orientation...what about queer women? come on.)

But yeah. the breast thing is a crock, I think.

She also once wore a full length fur coat to a vegan restaurant in Asheville. That takes nerve.

Not so much nerve, as major-league stupidity and insensitivity. Also, in some places, a death-wish.

My mom is Japanese.  My uncles and grandfather from her side all eat tofu daily.  When my mom would cook for us, dinner would usually have tofu one way or another.  So my brothers grew up eathing lots of soy.  No guys in my family have moobs.  All us girls in my family are in the Itty-Bitty-Titty-Committy as well.  At the time when we were trying to have a baby, my hubby was drinking soy, and was eating tofu, and we conceived in a week.  So there goes the low sperm count theory.

I don't know any vegan guys with boobs and I am... still flat too! Hehe.