Sometimes when I pee , I have the odd time had some semen come out or felt like its going to. I couldn't even go a week without masturbating now. Its just become an addiction & I like watching my semen ooze out & dribbling afterwards. Its great how much cum we can produce at a time depending on how long its been since we did the last time. It also depends on how much pressure you place around the genitals with a penis ring to. It can help increase the amount of semen more than the usual amount it does normally & the force it squirts out at.
Regardless of how much you might enjoy it, it doesn't sound right. Perhaps you should get it checked out. It could be a symptom of possible prostate problems.