Hello sir and welcome. I would require more information on the color, consistency and frequency of the fluid that is released post-intercourse. Is this the semen or just the natural lubricant which is released after ejaculation? Does it occur all the time? Dark as in? A darker shade of red? Or is it black? Does it contain any streaks of blood? Do you have intercourse with a condom? Is your wife on any type of birth control? Has your wife been diagnosed with any abnormalities of the uterus? When was the last time you conducted an STD panel? Have you undergone an ultrasound of the prostate? If so when? Please share that report with me as well? I have many other questions and can only help if you either meet a doctor and discuss all of this with him/her or write to me using our premium service. Best of luck sir.