Penis erection always good or bad to health nd mastriburation good or bad?

Question

Please use   natural aphrodisiacs which can improve your libido and prevent premature ejaculation. This would include carrots, fennel seeds, celery, bananas, garlic, onion, ginger, shellfish, lettuce etc. - including these foods in your daily diet will ensure that you remain free from sexual problems, including premature ejaculation.

Amar Deep · Accepted Answer

Please use   natural aphrodisiacs which can improve your libido and prevent premature ejaculation. This would include carrots, fennel seeds, celery, bananas, garlic, onion, ginger, shellfish, lettuce etc. - including these foods in your daily diet will ensure that you remain free from sexual problems, including premature ejaculation.

Poosha Darbha · Answer

Erectile dysfunction arises from numerous causes: 
1) tension,
2) psychological pressure to please the partner or prove himself
3) worry whether erections will stay strong and long, whether partner would be satisfied, worry about what would happen in future if -

ed occurs at this early age, fear of pregnancy, the partner's non-cooperation or disparaging remarks, dislike for some aspects of the partner, hostilities and tensions with the partner, finance- or work-related tensions, children being in the same room and a myriad other factors affect the erections.

On the other hand, it could be age, illnesses and medical conditions (diabetes, epilepsy, high bp, obesity, depression), hormone disturbances, problems with blood supply or nerves, use of certain medications, too.

What exactly is causing the erectile dysfunction in your case has to be ascertained first and then treatment be planned. 
Fortunately an exceedingly large majority of cases of ed can be treated successfully.