Thank you for your question, it is really unfortunate to know that you have been suffering from premature ejaculation. Do not get anxious. I would like to advise you that you must stop your bad habits, if you have or not premature ejaculation. You should know that these habits are very harmful to our body. I believe that you are an educated person, so there are no needs of a second person to teach it, am I correct? In these days premature ejaculation become a common problem between young people and can quite as conceding to both martyrs and their sexual partners.  The two factors that you have remarked in your question are widely assumed to reduce sexual interest and sexual function.  This could describe your present consequence with premature ejaculation.   Still, you must note that most instance of premature ejaculation stem form psychological effect with either partners or one. I would like to suggest that if you want to see any improvement then you must reduce your intake of both substances. It is better to consult your family doctor too, if these symptoms are badly affecting your sex.  Your family doctor also can help in advising remedies in the form of medicine or some other method. I do hope I did appease your concern well and take care always.