"But he’s not constantly trying to break out, unless he happens to be at a Hollywood fundraiser and a certain male movie star asks him back to his pad for a nightcap".
- My take on this is not that Kerry is AC/DC, but it does seem to hint that Kerry was invited to a Hollywood stars home, he accepted and, once there, he was subjected to an unexpected advance from which he tried to escape or "break out". For Stein to have heard of this incident means that it must be common Hollywood gossip and probably repeated about as a funny story.
Maybe it's the Peter Bogdanovich Syndrome.
A geek goes to Hollywood and finds himself in a world where very, very beautiful women are very available and goes crazy. The way Peter Bogdanovich went blonde-crazy over Cybill Shepherd and destroyed his directorial career. The way Gary Hart self-destructed over a minor starlet after his pal Warren Beatty introduced him to Hollywood.