Raymond: Of course, I'm not wearing any underwear.
Charlie: There is a Hell, sir. My father's in it. He is looking up right now and he is laughing his ass off.
Charlie: I'm gonna let ya' in on a little secret, Ray. K-Mart sucks.
Charlie: Does Raymond know how much money he's inherited?
Dr. Bruner: No, he doesn't understand the concept of money.
Charlie: He doesn't understand the concept of money? He just inherited $3,000,000 and he doesn't understand the concept of money? Wow, good work, Dad. I'm getting fucking poetic here.
Dr. Bruner: Raymond, wouldn't you feel more relaxed in your favorite K-Mart clothes?
Charlie: Tell him, Ray.
Raymond: K-Mart sucks.
Dr. Bruner: Oh, I see.
Charlie: You've got a date, Ray, you're gonna go dancing.
Raymond: Yeah.
Charlie: You know how to dance, Ray?
Raymond: No.
Charlie: I'll have to teach you sometime.
Raymond: Definitely have to dance on my date. Have to learn how to dance. Definitely. Now.
Charlie: Ray, you're not gonna have to dance, but I will teach you sometime.
Raymond: Definitely have to dance with Iris.
Charlie: Sorry I even brought this up. You're right, Ray, you got a date with the only famous dancing hooker in Las Vegas.
Charlie: I'm gonna go take a celebration piss.
Raymond: C-H-A-R-L-I-E, my main man.
Charlie: Who took this picture?
Raymond: D-A-D.
Charlie: And you lived with us?
Raymond: Yeah, 10962 Beachcrest Street, Cincinnati, Ohio.
Charlie: When did you leave?
Raymond: January 12, 1965. Very snowy that day. 7.2 inches of snow that day.
Charlie: Just after Mom died.
Raymond: Yeah Mom died January 5, 1965.
Charlie: You remember that day. Was I there? Where was I?
Raymond: You were in the window. You waved to me, "Bye bye Rain Man", "Bye bye."
Charlie: He's not crazy, he's not retarded but he's here.
Dr. Bruner: He's an autistic savant. People like him used to be called idiot savants. There's certain deficiencies, certain abilities that impairs him.
Charlie: So he's retarded.
Dr. Bruner: Autistic. There's certain routines, rituals that he follows.
Charlie: Rituals, I like that.
Dr. Bruner: The way he eats, sleeps, walks, talks, uses the bathroom. It's all he has to protect himself. Any break from this routine leaves him terrified.
Charlie: That's why they sent you away. Because you hurt me.
Answer: Susanna was there as well; Charlie just used the "date" as a reason for the three of them to go down for a drink together. He knew Iris wouldn't show up.