Hi Thank you for asking HCM I have gone through your query. Your problem can be due to anxiety. You can try stress relaxing exercises like breathing exercise. Squeeze and stop technique will be helpful in premature ejaculation. You can have sex in positions which give less sensation to penis. Usually rear entry positions give fast ejaculation due to over excitation. You can also use condom or condom with anesthetic which will decrease excessive stimulation on penis. Thought changing to something non sexual when nearing ejaculation is another technique. If all these not helping then approach a sex therapist or psycologist for behavioral therapy. If that is also not helping then SSRI group drug like dapoxetine prior to intercourse will be helpful. You can do stretching exercises for increasing penis size to some extent. Hope this may help you. Let me know if anything not clear. Thanks.