What are two examples of explanations that holdens gives for his behavior in chapter 9 in catcher in the rye?

One example in Chapter Nine would be Holden's stay at the Edmond Hotel. While there, he looks out of the window and can see the other side of the hotel. From this view he can see other rooms; in one of them, a man takes off his clothes and puts on ladies' clothing, while in another a man and a woman spit their drinks at one another. In response to his voyeuristic behavior, Holden thinks that he himself is the "biggest sex maniac you ever saw," but then paradoxically claims that he does not understand sex at all.