There have been not one but two scientific papers that describe scans of a man's nether regions that show haunting faces in places where they shouldn't be. A case study published in 1996 concerned a 45-year-old Welshman who was referred for an undescended testicle. The description reads, "the left side of the scrotum seemed to be occupied by a screaming ghost-like apparition."
Another case from 2011 revealed a face in a painfully-inflamed scrotum belonging to a 45-year-old Canadian man. The face looks as if it were also experiencing pain. You can see those faces in the provided links. Neither article notes the reaction of the patient, but we can imagine they were disturbed by the images.
Both are, of course, cases of pareidolia, or the tendency to see faces in odd places. This phenomenon is explained in detail at Cracked, which gave them a reason to talk about haunted scrotums.