hi sir i. from chennai,vinoth,student bachelor ,virgin,my age is 23,my weight is 70 ,my height is 5.9 ,i have been musterbating almost 5 years.nowadays my penis doesn t get harder,and my penis size is small only,but that time it will come some more inches ,if anyhow penis gets harder,becomes soft after 4-5 seconds later.i ve not taken any medicines for this problem.so,can t give pleasure to my girlfriend like before.please suggest me what kind of medicines and food have to take?