Hi Thank you for asking HCM I have gone through your query.You should get rid of stress and anxiety first as they are main culprits.You can practice squeeze and stop technique or you can let your wife to do that.You can deviate your thought to something nonsexual when you about to near ejaculation.You can put on a condom or condom with anesthetic which will decrease the excessive stimulation on penis and there by prevent premature ejaculation.If all these not helping you can approach an Urologist or sex therapist or Psychiatrist for behavioral therapy and medicinal management like anti depressants.Hope this may help you. Let me know if you have any further query.