Hi, I do not have experience with males but, I myself had a peri rectal abcess. Mine was cause by a fistula in my bowels that caused bm to leak into my perineal region. I had Ulcerative Colitis. Since the area had no access to air it went gang green. It was extremely painful. I had to have surgery where they removed 6 cups of gangreen from me. Every conective tissue in my abdomen went gangreen. None of my organs where affected though. That happened to me about 5 years ago and today I am fine. I am assuming you have been to a hcp since you know that it is a peri rectal abcess. If not, your friend really needs to see one. Good luck, and you can email me if you would like.