I think many factors go into wood and wood creation ability. Mental is certainly a component. Long story short, I am Pan Hypo Pituitary, today I am healthy and no health issues but 5 yrs ago, I had atrial fibrillation , ejection fraction of 10% (heart failure) no testosterone, no growth hormone, very low cortisol, thyroid everything, super low. On top of that they put me on potent Lasix and other meds. On top of all that, between the super hot nurses, I was still able to achieve erections the whole time I was in the hospital- no issues. I believe, I should get, at the very least a trophy for that outstanding performance