There are many groups spreading their opinions about it, and 95% of these people are totally uninformed and inexperienced with PE. Some are bad actors, most are retards and laymen, very few are trying it, and even fewer are trying it while at the same time researching the mechanics of it or anything else about it. Like with most subjects, you'll never know the truth about PE unless you spend a ton of time and effort figuring it out for yourself. I've tried some of it myself but at this point in time it's unclear if I have made any gains. I have however seen massive improvements in other things like erection quality, penis sensitivity, and orgasm intensity. I'm going to keep doing it regardless of if my penis size ever changes.