Wow, I thought I had read pretty much everything, but this is a new one.

http://prostatitis.org/redirect.php?lin ... own-semen/

Apparently, some men can be allergic to their own semen. I wonder if that could also cause a prostate flare, where the immune system is just way off and reacts weirdly. Might be something to check into for guys who get uti like symptoms when they ejaculate.