Interesting read I just made tonight.

Polyester apparently induces azoospermia in men. Another research cloncludes administered Testosterone didn't increase 5 alpha R in azoospermic men.

Azoospermia is when you have no sperm to ejaculate.

So, by analogy, I believe there is a new method to potentially crush DHT?

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References

1. Comparison between testosterone enanthate-induced azoospermia and oligozoospermia in a male contraceptive study. III. Higher 5 alpha-reductase activity in oligozoospermic men administered supraphysiological doses of testosterone
   
2. Contraceptive efficacy of polyester-induced azoospermia in normal men (Pay-to-Read)
   
3. Azoospermia