Mild burning with a feeling of ejaculation

First of all, let me state that I went to 3-4 different urology doctors, urine culture, semen culture, testicular ultrasound and urinary ultrasound all my results are clean. For 1.5 years, after urinating after ejaculation in sleep, I have a severe burning that lasts for 10 minutes after urinating, I feel it mostly from the root of the penis to the head, I pass it by urinating drop by drop, and there is no problem in my next urination. In normal masturbation, I do it with the stop-start technique, I feel a slight burning sensation in every ejaculation, that is, when the sperm comes towards the penis. I can’t orgasm, I don’t enjoy it, people who describe the feeling of ejaculation on reddit say that their penis tingles and they feel pleasure, I don’t have this feeling.