Besides taking drugs and eating soybeans. Could be the fact that everyone tries to hide from the Sun (Vitamin D), Stay away from eggs and meat (Zinc). And collect participation trophies instead of winning.
That pretty much sums it up.
I see more and more boys who have never been in the sun. Their mothers have been brainwashed to regard it with horror. Sunlight develops testosterone.
Food for thought: are those things the effects of low T, rather than the causes?
Zinc for your dinc, my Uncle Joe used to say.