I have got Recently Married,i.e about 1 Month ago. My pennis gets errect very quickly and then goes soft also very quickly. For this reason, I am not able to have sex for a longer duration which will satisfy my wife. During Masturbation, my pennis remains errect for more than 15 minutes but during sex with my wife, it does not last for more than 5-10 minutes. When my pennis gets errected and hard while fondling my wife, I have to insert it quickly in my wife's vagina. If i do not do this in 1 minute, it will go soft and lose errection. My wife is a very demanding woman and she does not like my pennis going soft when she wants it despartly. Please find me a solution