Dear Sir
My name is Imad , I am 35 years old , 190 cm heigh , 92 kg weight . I am married and I have i children ,
i married on 2008 , i have no sex relation before , the first night i was starting to make sex but i had no erection , i took viagra than its go ok , after that i hade to take viagra to have erection , but also at the begining i feel my penis inside the vagina but after a minute i felt no sensation from my penis and it start down that is no erection . now each time when i make sex i have at the begining full erection but after a while there is no erction so what shall i do . ??? thanks