Originally Posted by davidben
When I urinated a little while ago I noticed, maybe at the end of urination, a milky white substance in the urinal. It could've been chalky now that I think about it after reading a couple of others' posts.
I don't know what else you have read but did you notice this shortly after having an orgasm (it makes no difference how)? Could "chalky" mean "foamy?"
If you answer yes to these 2, it is retrograde ejaculation where your semen, instead of coming out your penis at orgasm, is going into your bladder. Typically, this is a result of having any type of prostate surgery but it is not unheard of for men whose upper urinary sphincter muscle (below the bladder) is not closing during ejaculation and/or lower ejaculatory sphincter muscle is not opening. Honestly, I am not 100% positive but if this is the case, I believe it can be repaired.
On the other hand, if there is any burning, itching, or pus present in your penis that is symptomatic of a STD.
Please keep us informed.