sir Am Rajasekar 25yrs male, till now I didint had sex contact but I use to masturbate several times, the cuntt also coming at the end stage, I also try to contact with one girl for 2 to 4 times, I cannot insert my penis , am very eager to have sex, but the problem is when normally my penis not getting errect straightly like normal man, my penis when I get into mastru its not errecting properly still 3 years , I dont know what to do....