Most people had never even heard of such a thing, much less know anything
about the causes, treatments, etc.
I was told that it seems to be a genetic kickback  (from inbreeding). NICE!
Mine never had a problem until I brought home a female to keep him company.
I had no interest in breeding, but I was afraid that 2 males would fight.
As soon as Critter figured out that he was a male, he started by chewing on
his penis. I thought that the female had bitten him. I took him to a vet (the
only one for miles that was even willing to LOOK at a glider. )This vet
knew nothing of the sort, and went along with my thoughts that the female must
have started it. I separated the gliders, and he was healing nicely (I
thought). He seemed fine, happy, bouncy, and normal. I was treating him
with an antibiotic ointment.
About two weeks later, I went home to find that he was not only mutilated
around his genitals, but he had also chewed a giant hole in his abdomen,
and half of his insides were showing. When I got him to the vet, we discovered
that to complicate things, and make an infection worse, he had chewed the
tubes that carry urine out of the body, so all of his urine was filling
this opening in his abdomen. He was at the vet, receiving fluids and
antibiotics, for about a week. Then one night, he died in his sleep.
My poor vet was a wreck, and felt terrible, as did I. And there was such a
lack of information available.
One of the people I talked to referred to this as a "loose screw" in the
glider's mind. I understand that once a glider has started to do this to
themselves, it usually is fatal, as the behavior continues until nothing
can be done to fix it.