Actually, I read a book years ago that talked in detail about Clark Gable, as well as a few other actor's sexual traits and abilities.
In reality, Clark Gable was said to have a disease whereby the foreskin of his penis would not retract causing him pain. Obviously he was not circumsized and because of the pain it caused he rarely properly bathed. This resulted in body stench so bad some actresses would refuse to do scenes with him.
Clark Gable was also said to have chronic bad breath, which was verified by Vivian Leigh when they filmed Gone With the Wind.
Finally, Clark Gable was said to have had many gay affairs.
I never got his appeal personally. Always seemed greasy to me.
I also distincly recall the book said that, of all people, Milton Berle was known for having the biggest, floppiest dick in Hollywood. And he had a pension for showing it to anyone that questioned.