Regarding the problem of Erectile dysfunction
, it is due to decreased blood supply to the penis.
And medications like Cialis & Viagra increase blood flow to penis & maintains erection.
It can be improved by having a diet rich in fruits, vegetables, fish, nuts & honey.
You can also do oil massage of the penis...it increases blood flow & maintains the erection.
Regarding the problem of premature ejaculation
, it's mostly related to anxiety
that whether you will be able to perform or not.
So...don't worry about all this & stay relaxed during intercourse.
Avoid stress...practice meditation
..this helps in improving concentration & builds up the confidence level.
Avoid smoking & alcohol.
One more thing...avoid consuming any over the counter medication
which claim to increase the size of penis or improve performance...it may be harmful.
Best thing is to eat a healthy diet, exercise regularly, avoid stress, get good sleep, think positive and stay happy.
Wishing you a Healthy Life.