I am 35 years wid sound health. I have intense sexual desire but after adequate foreplay ,i just penetrate with a single struck ,ejaculate, very frustrating situation .i tried lot but not able to overcome. Since that it is not erect for half an hour. I use condom during course. I am helpless .pls help ,more over crystal condom is helpful to delay .pls help me .my wife lost her passion and interest.