Hi Thank you for asking HCM I have gone through your query.It is a normal process to ejaculate in sleep if your semen didn t go out by sexual activity or masterbation.If you are getting premature ejaculation in normal sex then you can try following.You can do squeeze and stop method.You can stimulate your partner before getting yourself stimulated.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 then 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.