Well here's an article that discusses this very subject. Why do these men do this? I see nothing about a two thirds figure but it is kind of mystery and various experts have their own explanations.
But they are saying that guys like CK doing this sort of thing are suffering from a disorder:Unfortunately, Cantor said that it’s hard to know what causes the behavior in men: They can spend years in therapy trying to figure it out. Dr. Prudence Gourguechon, former president of the American Psychoanalytic Association, told CNN that she thinks it comes from a “wish to be looked at and admired.”
Gourguechon also has a theory that the behavior allows for “a kind of strange plausible deniability.” As she explained to CNN, “He could think to himself, ‘Well, I didn’t rape anyone,’ which is true in the broader sense, but it is a twisted defense.”
NopeAre you surprised to learn that masturbating in front of someone is a disorder?
https://www.livestrong.com/article/1...n=AOL-Wellness