Can frequent masturbation cause problems while urinating?

Hello doctor,

I am a 27 year old unmarried male. I have a problem while urinating from past two years. I have consulted my urologist, and we did many tests like urine culture, serum creatinine, and ultrasound KUB. After all these tests my doctor said there is no problem in my urinary tract. A few months later, I visited the same doctor, and he asked me to do thyroid profile test and uroflowmetry, but there was no problem with those test results. Finally, because of my frequent visits, my doctor did a cystoscopy, and he said everything in normal.

Sometimes, I get a burning sensation in my penis when I urinate, from the past two years. I do not see any significant change in urine color. And sometimes I see some fluid in end of my penis; maybe it is prostate fluid. I frequently masturbate, minimum three times a day, from many years. I noticed that I get aroused without sexual stimulation. I also have little pain after ejaculation, and I feel that there is nothing wrong with the urinary system. I need to give more pressure to urinate, and I feel the penis does not carry the fluid properly. Can masturbation be the reason for all this? I am going to get married next year. Please help.

Thank you Doctor,

I already had Tolterodine a year back, Can I repeat it now? My problem does not occur every time. Sometimes urination is normal. I feel pain in the left side penis and abdominal area whenever erection and ejaculation happens. During that period only I feel frequent urination and could see prostate fluid in end of penis area. Why does it happen? How to resolve this? Will it affect my marriage life?