Hello Doctor, Actually,I am in relationship with a girl since 5 years. We haven't done anything sexual yet and still we love each other. We have decided to Have some sexual intercourse between us on her birthday. So i want to make her happy so much. Because of my weight, My penis is small sadly, and i have no idea for how much time i can perform in bed. So, Please suggest me something. Is there is anything to increase my Size or maybe my Sexual Time. Is taking viagra helps for staying long in bed for one time. Which viagra should i take? I don't have any medical problem at all. Please help me out, I don't have that much financial support for a paid doctor in my locality, so i am hoping if you could help me out Thank you so much.