>>12670434>>12671498Okay, you haven't received any good answer yet so I'll give you one.
First, drop the pseudo-scientific lingo. "Low dopamine" is how journalists and Internet posters try to appear smart, the reality is far more complex. Emotions aren't reducible to simple levels of chemicals.
Second, be more specific and drill down on what's actually the problem. Constant low sex drive? Good sex drive but you can't maintain an erection? Good sex drive and erection but you have very delayed orgasm?
Third, the obvious causes. Could you be asexual? Are you on an SSRI or some other drug that can affect sexuality? Are you heavily depressed? Did you have a shitty circumcision that let your dick with little sensitivity?
Fourth, if it's not one of the obvious causes that Google will tell you, go to a specialist doctor. Before you go, rehearse a description of your symptoms, as specific and detailed as possible.
Fifth, do not take Mucuna Pruriens / L-DOPA. If someone recommends it, ignore all his other advice. In general, avoid weird supplements from the Internet unless you really research them thoroughly.
Examine.com, /r/DrugNerds and /r/AskDrugNerds are good starting points.