hi, thanks for writing..i have understood your concerns.. your problem is called, premature ejaculation or early orgasm.. you shud spend more time in foreplay before going for penetrative sex..read on the internet about foreplay or watch porn movies so that you can understand how to approach.. it is mostly of psychological origin due to anxiety related to sex, past failures and partner satisfaction..so you shud control that.. for delaying ejaculation there are behavioral techniques which can help you prolonging the ejaculation time without taking any drugs.. druga are also available for prolonging the ejaculation time, but there are some side effects also.. in my opinion you shud consult a psychiatrist or sexologist, ans ask for help..give detail about your problems and undergo sexual counselling, you shud take your wife with you foe treatment purpose.. i hope this advice is helpful to you..best of luck..