20 yr old male here as well, and have the same story as you do. I have done so much research on the topic.
I do think the start and stop technique is good. Holding ejaculation in after masturbating over periods of days however is bad.
anyway, after lots of research I have kind of found out about neuroplasticity of the brain, and how it adapts all the time. kids can be trained to not have adhd anymore just by mind exercises for example.
anyway I think that over-masturbation just trains your brain to come quicker if you do it quick, and depletes your brain of some chemicals and over a period of years it just stays in that sort of homeostasis.
Umm, so the websites you look at to gather your information, the supplements they offer are a crock of poo. Bad deals, way over priced.
I am starting to take supplements from puritans pride
that include
liquid fish oil/flax oil (liquid is 1000% better then pill form with fish oil)
methionine, magnesium, protein shake/powder, magnesium, multi-vitamin, 5-htp, vitamin C, and some borage oil for prostaglandin e1
ummmmm, this is sort of my own "vitamin therapy"
I assume it will take months if not a year before I see true results. Neuroplasticity takes a lot of time. Masturbation wise I plan on stopping for a while.
hopefully only doing it once a month for several months until my body/brain get back to normal, then just masturbate normally again.
but yeah man, this stuff is kind of goofy. if all fails, you have spent some money, and got a heck of a lot healthier with that sort of vitamin supplements
But I think it might work, and I am sure that it will make erection strength a lot better
LETTING YOU........wear some durex climax control condoms (numbing condoms) without losing your erection, walaaaaaaaaaa all better!