The problem with science is that many people are only looking at one angle. What you are missing in this equation is the relationship with elevated E2 on prolactin. High test/high E2 potentiates prolactin if unmitigated. For many, this is the culprit to their ED. So, while I agree with some of your points about DHN, I think you are posturing with throwing the word "science" around. Doesn't make your high test/low deca claim true. In fact, it backs up my claim that it is dependent on each person's response and body chemistry and what is out of balance. DHT? maybe. E2 and prolactin? Maybe. Get bloods and find out.