I found this youtube video (source link HERE) and I thought the infomercial was well done.
I remember trying to make the heels in my shoes thicker years ago and I do notice that my confidence or state of mind improve from wearing taller shoes and looking taller.
If you are willing to wait a while (like a few years while the science and research catches up) then I might suggest for the guys to go with these really nice looking lifts aka height increasing dress shoes. I think the main selling point with this brand of thick heeled shoes is that they are more comfortable than some others. They say the insoles are ergonomically designed.
[Marketing Lie Alert! – The issue with this product is that although they claim the shoes are supposed to make you appear to be 10 cm taller, the sellers are very deceptive in not making the note that the 10 cm increase is from not wearing any shoes, but not compared to a person wearing average heel thickness shoes. If this was the case, the claim would be that the shoes only increase in appearance height of 6 cms, not 10 cm, since most dress shoes already have about a 1.25-1.50″ (3-4 cms) . This is a sort of a marketing trick to make the product seem better than it really is]