Quote from Niles in They're Playing Our Song
Niles: [singing] Claustrophobia, Nymphomania, He will probe ya, He'll explain t'ya- It's brilliant. Frasier: You know, it does have a Cole Porter-y, Stephen Sondheim-y flavor, doesn't it? Niles: Oh, absolutely. Sondheim-y would have killed to have written this.