There isn't though, or none that I have noticed. They never found a fistula about 6 weeks ago either when they shoved a kind of endoscope up my hole either. However, when the doctor was fiddling about with his fingers today he said there was pus. I didn't have the heart to say it was cum.
Think that is actually the perineum. Anyway, the good things that have come from it all is they did a CAT scan a few months ago when I was in hospital and they said my liver and kidneys were fine and after the doctor's finger being up my arse today, surely that means my prostate is ok too, otherwise he would have said something.