Never had my PDE5 enzymes measured... I don't even know how they would do that haha.That's like a permanent dose of viagra. Did you actually have your PDE5 levels checked?
But my experience, is that I get so many random erections from doing this (Not necassarily arousal), ESPECIALLY since I started taking Ecklonia Cava, which is the most underrated nitric oxide enhancer that I know of.