Well like I said the DHEA boosts tertosterone, so over time it makes men feel a little younger (you know younger guys are usually more sexual, its because they have higher levels of testosterone in their bodies) and more into sex, wanting it more and such. It will also give him more energy all together.
Ok now the E-400 makes men produce more cum during ejaculation, so more cum more sperm, and more of a chance of getting pregnant.
Now the 2 I added at the bottom (the terribules terrestreus and yhombine) just help the DHEA produce more testosterone, but Im not sure if you can still get it over the counter.
Let me know if you have any more questions