I read somewhere some time ago...now I wonder if I'm all wet--that a cleft chin is a kind of benign cleft palate--a problem in development that turns into an asset...at least as far as Cary Grant, Kirk Douglas and Robert Mitchem were concerned!
Don't forget Clark Gable! This is fascinating ... if a larger-than-expected percentage of what are considered the handsomest men ever had cleft chins, does that imply that the feature is linked to some genetic advantage that we're not aware of?