I'll be discussing this with my urologist, but I'm curious to know if any of you had experience blood in your semen over a period of more than a month. I haven't had a prostate biopsy or anything else that I've read about that may cause it. I'm 64 and my prostate is slightly enlarged, but nothing serious. Frankly, I'm concerned that anal sex may have injured me in some way. Geez, I hope not!