WHY they gave JFK a pass is more difficult to determine, and requires not only research but a lot of speculation. Based on what I've found, it has to do with "projection." The mostly-male reporters wanted to BE JFK, and projected themselves into his libertinism, his wealth, and his power. He was, after all, the epitome of a good liberal: he didn't have to play by the rules that he made everyone else play by. I go into a lot of this in the book, so it's not a quick argument; but JFK was a "journalist," in that he had done some war reporting, so he was "one of them" in yet another way. Further, "Camelot" provided them with the Washington social scene that they loved. He also made important changes in how he handled the press that I discuss.
JFK made me do it???
FGS