olivant, I believe that there is a part in the book that indicates that Vito was not too happy upon learning that Fredo had gotten quite a reputation as a lady's man while in Vegas. I'm almost sure that it says something to that effect.
True, but FreddoN is referring to novel passages describing him prior to his Las Vegas stint: "Well, he was always too serious when he was young." His "playboy" activity did not begin until after he took up residence in Vegas.
