Richard Chamberlain sure knows how to keep a secret. He's a master at it. In the public eye for over 40 years, he has been defined almost entirely by his roles. On screen he was this devastatingly handsome heartthrob, the star of Dr. Kildare and the dreamy king of such exotic miniseries as Shogun and The Thorn Birds. Yet Chamberlain remained a distant figure whose private life was always off-limits. Until now. In an interview with TV Guide, Chamberlain admits that he's gay and that almost 20 years ago he wed another man, Martin Rabbett, who is now his manager....