Sir i am male 29 year old , i am suffering from sex problem, while doing sex with my girlfriend, in first stage penis get normal erection and me and my girlfriend enjoy it , but i ejeculate after 5 - 10 minutes only, while my girlfriend didn t, it doesn t occour always, at certain occasions I ejeculate after more then 20-30 minutes. But once I ejeculate I didn t get erected again for another intercource, while my girlfriend is always ready