a) nobody has tested my testosterone or my great grandpas to my knowledge b) Both of those are taking drops over a certain period and then you're extrapolating

a) nobody has tested my testosterone or my great grandpas to my knowledge b) Both of those are taking drops over a certain period and then you're extrapolating back to my great grandad and assuming certain results, which is a bit tenuous. No to mention also assuming the cause. Quite a long way away from a "non-controversial established fact."