Premature ejaculation/erection

I have a problem with premature ejactulation and i beleive it is caused my my constantly contracting my penis to get a maximum erection, is this the case and if so how do i keep myself from doing it because it has become involentary?

how do you know if you have premature ejaculation?

A doctor told me that if you can have reasonably agressive sex for 5 min. without ejaculating, then you fall into the normal range

One day with Premature Ejaculation Problems I went to a doctor. The doctor said, "Whenever you feel the urge to ejaculate, startle yourself" So I went out and bought a starter pistol. When I got home my wife was naked in bed ready for me. So we got in the 69 positoin and started at it. When I felt the urge I fired the pistol. The next day I went to the doctor and the doctor asked him how it went. I said, "Not to good. My wife bit off three inches of my dick, shit in my face and my neighbor came out of the closet with his hands up, naked"

Premature ejaculation is usually defined as the male coming before his partner is satisfied. Most males, especially young ones, can get hard and cum in a couple minutes, but that doesn't usually make for a very satisfying experience--especially for his partner. If you're beating your meat and just need to get your rocks off, then a two minute session is fine (especially if you're horny and getting off in a bathroom stall). But with a partner you need to learn to control yourself. Jacking off nearly to coming and then stopping, then starting again, back and forth, will help give you control over your ejaculations. And it's fun!

What drugs have you tried? Was there Extagen among these drugs? It helped be very fast when I had this problem. It was the first and the only drug I tried.

Extagen helps undoubtedly. Expensive but effective.

Is there a drug or medicine that we can use...that somehow can aid me in prolonging my sexual performance? I hope you can give my some useful advice...Im desperate