Ok. So Whenever I'm making great gains, I feel spectacular. However, the is testicular atrophy. No, I'm not using gear. I'm just wondering if my body's natural test levels can do this. Also, I notice if I stop working out for a week or two, my libido goes nuts. Meanwhile, when I am working out, I have only the faintest urge to get busy. I've done some reading. Is this due to the fact that my test converts to estrogen after a time and that's why I get that way? Just looking for some affirmation to my assumptions.