Quote from Martin in Merry Christmas, Mrs. Moskowitz
Martin: Hey Fras, you know, since it's the night before... Frasier & Niles: Dad! Martin: Oh, great, would it be a crime for somebody to tell me we had guests here? Hi, I'm Marty Crane. I'm Frasier's dad. Although you'd never guess it from the way I'm treated like a second-class citizen around here. But as long as Frasier's happy, why should my feelings matter?