What does Holden have against bald men?

If I'm not mistaken, you're talking about Holden in the book, "Catcher in the Rye"? Well, I don't think he has something against bald men, but 'balding' men. When he saw a 65-year old balding bellboy comb his hair all the way to cover up the balding spot he had, he thought that if he'd ever be balding, he wouldn't cover up the spot and rather be completely bald.