I'll just add that there are valid medical reasons that some men can not make sufficient testosterone on their own. Sure, there are some guys who want to amp themselves up with test. You typically find them at the gym trying to be bodybuilders. A good doctor will first attempt to find out why you aren't making test. on your own before prescribing treatment. There are a few treatable conditions that may not require tes. supplementation. But, if your body can't make much test., then treatment is the way to go. Yes, it is a lifetime thing. Yes, supplemental test. will shut down your remaining natural production and shrink your testes, unless you treat that too.
This is a serious problem for some men. We aren't messing with this for ****s and giggles. We do it because it allows us to live a more normal life.