Discharging Fluid While Urinating

This has happened to me several times, including today, which prompted me to bring it up. After being locked for a few consecutive days, I sometimes notice that when I think I’ve finished urinating, there’s still a little bit left. However, upon squeezing out the remainder, I realize it is actually semen. Once I spot this happening during my time in lock, I estimate it occurs roughly every other day.

Has anyone else experienced this?

I have only encountered this one or two times in the past year.