I have been thinking a lot about a friend of mine lately who complained of depression low sex drive and just general disinterest in life. he had gained weight and was losing desire to work out. he had spent the better part of his life bodybuilding but was then incarcerated for 6 years which a lot of was spent in the hole with little to no protein or activity. after a while he started noticing that he was losing desire to even stop at the old spank bank to make withdrawl. anyway after his release this feeling followed him. which brings me to my point, I believe not having other people around, especially females cause males to produce less testosterone....I feel like your body is not getting like "challenged" by being around others...like some evolutionary thing... im sorry I sound so dumb but not sure how to explain. I want to say that I read an article somewhere supporting this but wanted to see what other ppl thought before I just googled...sometimes others experience is more valuable and correct. im wondering in regards to t.r.t, b.t.w. as in do I need it, but not the main question.