Hello and welcome to Healthcare Magic. Thanks for your query. You have mentioned about two sexual problems, namely premature ejaculation and small penis size. Premature ejaculation can be due to different causes - both psychological causes and medical causes. But in a young person, it is more likely due to a psychological cause such as anxiety. To increase the ejaculation time, you can try practicing certain exercises like Kegel s exercises or techniques like the Masters and Johnson technique. Alternatively, there are medication available which can help delay ejaculation time. Penis size of 4.5 inches is within normal limits. Moreover, there is nothing which can be done to increase your penis size. So, stop worrying about this. Also, penis size is not the primary factor for successful sexual intercourse and good sex life. Wish you all the best. Regards, Dr. Jonas Sundarakumar MBBS., DPM., MRCPsych.(U.K.) Consultant Psychiatrist