Forlorn my brother, I do the cold showers. supposedly it increases testosterone. i don't know how factual that is. i do it because it's regulated stress. called hormesis. a little stress helps your immune system. i don't know if this is bro science. but the main reason i do it is because i don't want to do it. it is cold and uncomfortable. if i do it early in the morning, i figure it helps if something uncomfortable or something that i don't want to do but have to comes along in my daily routine. i have already put up with the hard part-cold showers. especially in the wintertime. not perfect. i don't always do it. sometimes i take the easy comfortable warm shower. i need to be reminded that i live a very comfortable life that is literally killing me. i.e. good, warm, sweet food-sugar. salty fat laden french fries. high sugar drinks. nice warm bed indoors. etc. etc. again just my 2 cents worth.