Hello dear..
First of all remove all myths & misconceptions from your mind about
masturbation.
In fact, Masturbation is completely normal & doesn't have any bad effect to the body and mind.
The limitation in pulling back of the foreskin and vein joining the tip of the penis may lead to trauma & bleeding during sexual intercourse.
So...it will be better to consult a Surgeon and discuss about this matter.
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.
Avoid smoking & alcohol.
You can also do oil
massage of the penis...it increases blood flow & maintains the erection.
Despite these measures, if you experience difficulty, it will be better to rule out other causes like
high blood pressure, blood sugar and other local causes that impair blood flow to your genital organ.
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.
Wishing you a Healthy Life.
Take care.