[jasmine]

First, what do you mean by "developing" premature ejaculation? Does this mean it is getting worse or has it always been a problem? I have not ever seen evidence on the relationship between porn and premature ejaculation, and part of the reason for this is that every case of premature ejaculation has a different cause based on the individual. While in your case the two may be related, it is almost impossible to study the correlation, because every individual with PE has a different cause. For some it may be pornography, and for others it may be prostate problems, thus introducing boundless confounding elements into the study.

However, if I had to speculate from experience, I think about 30% of men have premature ejaculation. It is one of the most common sexual "dysfunctions," if you want to call it that. Evolution probably favored it, because imagine if it took human beings an hour to have sex when there were constant and immediate threats going on all over the place. The slow-ejaculating individuals would never reproduce because it takes them so long!

I think you are perfectly normal. But this could be your problem: perhaps by watching pornographic movies you have come to the conclusion that it is normal for men to be able to hold out for an hour every time, and that affects how you feel about yourself. I'm pretty sure that the men who shoot porn are unrealistic in that aspect, so I wouldn't compare yourself to how long those guys can hold out.