If you have tried everything for your p.E. And nothing has worked, a low dose of an ssri antidepressant will lengthen the time it takes you to ejaculate.
Paxil, zoloft, prozac etc, will all slow ejaculation times without any mood altering effects in the non depressed person.
Do a google search on ssri side effects or paxil side effects and you will see what i'm talking about. Delayed ejaculation is a major side effect of these drugs.
They have been used safely in non depressed people in the treatment of premature ejaculation and it works pretty well 100% of the time.