Thanks, I am able to have sex for 1 hour without problem around erection %90 and many of people are not having a total hard on penis and this makes me feel that there is no venous leakage but the thing that I can not understand is why this can only understand with Doppler test.
It has no indicator ? Having a non problematic sex can not rule it out?
It is a weird thing. isn't it?

Hey Redline, I don't know about the porn, but if you want to know whether you have a venous leak you need to get a doppler penile ultrasound done. Until you get this, there isn't much point to carry on speculating. Over masturbating can apparently cause problems for some, as can watching porno, but I don't have personal experience with those types of ED but many others on here claim to.
Your testosterone isn't low enough to be considered low, but maybe you will want to get a repeated test. Check other things like estrogen, free androgen, thyroid panel as well.

My testosterone was 630 six months before and now it is 520.
The thing which is interesting is I was not getting morning wood when I was 630 t level but now in 520 t level I am having morning wood (%85-90 hard)

The urologist that I went said all is well but another commented to my 520 t level is some below the normal levels for my age.

I don't want any Testosteron replacement therapy because it is for life and has many side effects. I am really scared

Well cardiovascular is only one cause, most prevalent in much older people. At a younger age you generally should have: 1) Psychological issues (most common), 2) Vascular issues then also possible is hormone issues with your endocrine system. Your doctor needs to run Hormone Panels as well as a TSH Thyroid panel, cholesterol and electroyte panel. From there, you should acquire a hard copy of your results to analyze yourself based on the ranges recommended by the respective health agency.

No, I don't think so. You can't go by that, you have to go buy symptoms. For me, it started at 16 which is not normal. I waited forever to investigate, being pushed away by doctors as psychological. Now they say hypoganadasm or venous leak, but low T causes venous leak, which doesn't seem to be a standalone disease (its a symptom of other problems, so by fixing those problems you can perhaps solve the so-called leak.) Im not familiar with your condition, but the only way to know is to see medical advice, blood tests, as well as discuss and compare your symptoms.