I've heard that a lady named Kathryn Smith has been writing a Jack bio.

I don't think Jack was gay. Anybody watching his film and tv career closely probably feels the same. Watch the way he handles his leading ladies. Often be would kiss them on the lips and then move down their neck (He did this with Liz Montgomery and Susan Strasberg to name a few). He always caressed them when holding them in his arms. These are not the moves of a gay man. Just take a good look at the man's actions and most of all how he TREATED women.