My doctor wants to start some testosterone treatments on me because he says my levels are too low (they are 231 ng/dL and he said it should be between 348 to 1197). The question I have is, given that I don't have a girlfriend/wife, have never been on a date and am still a virgin (age 38 virgins, yes we exist), is there really any need for me to worry about my testosterone level? It seems everywhere I look on google it is all about sex and sex drive. As someone that has no need for sex or a sex drive (see no wife nor girlfriend), is there anything else I would even care about? Do I really need to up my testosterone?
Firstly, only your doctor can know if your levels are actually low enough to cause these symptoms, so you should ask them. I'm only including the rest of this answer to let you know it's worth asking.
As it relates to fitness, low levels of testosterone can lead to reduced muscle and bone mass . Low muscle mass (and presumably reduced muscular gain) is obviously bad if you're interested in getting stronger or bigger. Reduced bone mass is bad for just about any kind of exercising that involves impacts or heavy loads, like running or lifting, because it increases your chance of injury.