Semen in urine?

I have not had any wet dreams nor accidental ejaculations while awake (knock on wood - ...no pun intended). Around once a week, I've noticed semen in my urine after getting a tremor-like sensation in my pelvic floor/prostate. I have not been able to find anything like this in my research. Has anyone else experienced anything like this?

*I am reasonably sure this is not a retrograde ejaculation.

 

Well, although it's a relief to hear that I'm not alone in this and it's likely not a huge health concern, it is strange, nonetheless. Ty, for your reply.