I just finished reading 4-Hour Body, and I can't help but to dwell on the section where Tim Ferriss says he found a way to boost his testosterone levels, literally creating a radius of hormonal effects around him in which every lady he passed suddenly became aroused.

Is it really possible to change your diet / take supplement/ do anything that will actually make you exude testosterone and subconsciously affect the people around you? What triggers this? Smell? Some sort of aura?