hi..thanks for writing ,,..i have understood your concerns.. masturbation habit is not bad but when it becomes excessive then it may cause problems like what you are facing right now.. in masturbation you stroke with your hand very fast and thats why the sensitive part of penis is stimulated strongly..on repeated performance there develops a conditioning in which person is conditioned to ejaculate early.. no need to worry, you just decrease the frequency of masturbation to 2 to 3 times in week and perform some behavioral methods like squeeze technique. stop-start method to delay ejaculation..you can read it from the internet.. sexual experince is different from the masturbation so you shud not worry..you will be alright.. there are drugs available to delay masturbation but you dont need to take them at present..you can consult a psychiatrist and tell your concerns.. i hope this will be helpful to you..best of luck..