Are You Man Enough?

Testosterone can make a difference in bed and at the gym. And soon you'll be able to get it as a gel. But it's a risky substance. And is it really what makes men men?

Whatever else you may think about testosterone, you can tell it's a hot topic. Every time you mention that you happen to be writing about it, the first thing people ask is "Can you get me some?" (Everybody, even the women.) Maybe that's not so surprising. If there is such a thing as a bodily substance more fabled than blood, it's testosterone, the hormone that we understand and misunderstand as the essence of manhood. Testosterone has been offered as the symbolic (and sometimes literal) explanation for all the glories and infamies of men, for why they start street fights and civil...

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