The reason why men ejaculate fast is due to the following reasons: 1. Disease factors, chronic prostatitis, balanitis, prepucenitis and other andrological diseases will make the male penis painful or swollen during the erection process, which will lead to rapid ejaculation. After the occurrence of andrological diseases, you should go to the hospital andrology clinic for treatment in time. 2. Psychological factors: many men have too much pressure in their work and life, and they are powerless and uninterested when having sex, which will lead to rapid ejaculation. Men must adjust their mentality, communicate with their wives more, and their wives should comfort their husbands more. 3. Nervous tension, many newly married men will ejaculate too fast, because of the lack of sexual knowledge. When facing his wife, nervous tension will lead to the excitement of the penis nerve, which will lead to ejaculation too fast.