He is not gay, he is an exhibitionist, he gets a kick out of advertising to the world his sexual deviances Think of it from a different point of view, ignore for a moment the fact that his book was written under the pretext of an exjw exposing the Watchtower.If someone who never heard the arguments about the jehovahs witnesses read his book will assume there are just too many references to masturation and other embarrassing sexual references for any normal person to want to write about.There is something wrong psychologically with him apart from the fact he is a total narcissistic scum.
It's the same sexual arousal that an exhibitionist gets by exposing himself in public, He gets the same arousal writing about it no matter how humiliating or publicly exposed he becomes