When as a rampant youth with way too much product, and often cumming early, I read an article about premature ejaculation in forum the sex advice booklet by Fiona Richmond in Mayfair magazine. Basically I used to masturbate in the toilet on my own first to unload some, and then I was good to go for a decent session and getting my girlfriend off also. We used to read those pieces often, sometimes for a laugh, but it was great sex education for us. Back in those days when sex education was not discussed at home or at school, that was the best we could get other than trial and error.
That drove me to read up more and learn to please my partner and myself. I know that some men would find that hurt their machismo.