How to achieve full erection while having sex?

Hello doctor,

I am experiencing erectile dysfuction issue. I am not able to achieve full erections while sex. There is no previous history of this issue. Kindly advice the further action to be taken.

Thank you.

Hello doctor,

I used to masturbate from a very young age. For the last nine years, I used to have intense masturbation sessions until last year. I used to have these sessions at least two times a week. The sessions would include watching porn and self-stimulation, and I would prolong this in the night for up to five or six hours at a stretch till dawn. After that, I would ejaculate five to ten times continuously and then go to sleep. Over the last three years, I have discovered a method to stop ejaculation by clamping at the penis head at the climax so that I do not lose the semen. Since last year when I have been with a partner and my penis would not attain the full erection when we tried to have sex. I am still able to ejaculate with hand stimulation and porn, but a full erection is not achieved. I remember my erections used to be normal, and I had morning erections too. I used to have wet dreams. But for the past few years, I have stopped having a hard erection or morning erections. I do not have diabetes, hypertension, or smoking/drinking habits. I may have been addicted to porn. I have a very active sporty lifestyle involving intense physical activity for two to three hours at a stretch. Apart from the daily stresses and some family and career stresses, I have no major stress.

Thank you.