His book gives insight into his thinking. In the book, Taylor says that his song was the nicest thing anyone's ever done for her. He really does think that all other guys treat women like shit, and he alone is the shining knight they've been waiting for, so he gets really pissed when he makes an effort to be nice and isn't rewarded with sex. Meanwhile, in reality, many men are nice to women (and other men) because that's what's expected of a civilized adult in today's society. You don't expect a reward for doing what's expected. And though he's never said it, I get the distinct impression that he thinks either he's the first person to ever write a tribute song for a celebrity, or at least he thinks it doesn't happen often. TS, because of her talent, and the fact she's quite a looker probably has some weirdo out there who's written an entire opera about her.