Penis is difficult to erect, frequent sperm emission, what's the matter?

Patient's question:

26 years old
Condition: From the age of 15 to 17, I experienced morning erections every day, and at that time, I had a frequent history of masturbation. After the age of 17, I sometimes had morning erections, and sometimes did not, occasionally masturbating as well. In recent years, I have had the problem of frequent nocturnal emissions, with the most severe case being for 5 consecutive days, with emissions every day. I also experienced emissions when I was tired, after taking a cold shower, or during a nap.
Current general condition: When sleeping alone, my penis can become erect and I can complete masturbation. When sleeping with my girlfriend, my penis secretes pre-ejaculate fluid, but it is very difficult to become erect. Even when it does, it is not very hard and quickly becomes soft. Sometimes it is like this.

Doctor's answer:

The above conditions are often considered to be caused by factors such as kidney deficiency and erectile dysfunction. Erectile dysfunction refers to the inability to achieve and maintain an erection sufficient for satisfactory sexual intercourse. The main causes include psychological factors and organic factors, such as prolonged inappropriate sexual activity leading to psychological stress, inappropriate or insufficient sexual stimulation, adverse sexual experiences, poor sexual environment, abnormalities in the corpora cavernosa, endocrine diseases, and other factors. Common treatments for erectile dysfunction include psychological therapy, behavioral therapy, and targeted treatment for specific causes. It is recommended to visit our sexual dysfunction department promptly, follow medical advice, and undergo relevant tests such as nocturnal penile tumescence to clarify the condition. Based on the test results, actively cooperate with treatment as directed by the doctor.