There's a myth/legend/rumour over here that there are high levels of oestrogen / progesterone in some soy and tofu, because it is grown in areas where many of the women use the contraceptive pill and the soy absorbs the extra hormones... I have no idea how true this is, or what percentage of tofu / areas of the world are affected! Soy is a phytoestrogen, and some reports suggest it can mimick the birth control pill. I'm struggling to find any unbiased information!
This is attributed to rising infertility levels in men. It used to be thought that some men may be gay because of a hormone imbalance - at one point gay men were actually given testosterone injections! This appears to have been disproved, but, if vegan men tend to eat more soy, may explain why people believe there is a link between being vegan and being gay? More info here
As an aside, it is now thought that a foetus may become homosexual depending on the hormones it is exposed to in the womb. So maybe having a vegan mother could make you gay?
Or maybe gay men are just more open to being vegan, instead of eating lots of butch, manly steak to impress their mates? Or maybe vegan men are more open to being gay? The only other vegan girls I know (outside this forum) are lesbians - all the straight ones seem to live off low-fat ham
[goes to have a lie down in a dark room]