White discharge out my pens after urinating
There could be a number of reasons for that, depending on when you last masturbated, it could be semen, it may also be semen discharging itself if you haven't masturbated in a while. It could also be from an infection, either, urinary, or an STD, or even from your kidneys, you didn't mention any burning sensation while urinating, which is normal with infections, it might clear up on it's own in a day or so. If it doesn't I get it checked out