Sheldon: I thought you said I was supposed to have fun.
Mary: Go and change. You are not wearing that.
Sheldon: Then I'm not going.
Mary: You're going.
Sheldon: Then I'm wearing this.
Mary: No, you're not.
Sheldon: Yes, I am.
Mary: Well, if you're gonna wear that, you need to participate.
Sheldon: Participate how?
Mary: Party games, cake and singing "Happy Birthday."
Sheldon: No games, one slice of cake, and I will mouth the words while the others sing.
Mary: One game, and you need to interact with the other children.

Sheldon: Regardless, I'm not interested in making any more friends.
Mary: Oh, I don't think that's how you really feel.
Sheldon: It is. From now on, it's a hermit's life for me.
Mary: I bet, when you grow up, you will be surrounded by lots of smart, wonderful friends.
Sheldon: I can't see that happening.

Sheldon: Mom, when should I be expecting my testicles?
Woman: [turns around] What is wrong with him?
Mary: Nothing is wrong with him. Now turn around before I knock your lights out.
Sheldon: Hello.

Mary: Sheldon Lee Cooper, if you don't finish that pork chop, I swear I will chew it up and spit it in your mouth like a mama bird.
Missy: Do it, Mom. Do it.

Brenda Sparks: What are you doing out here?
Billy Sparks: Playing with Sheldon.
Brenda Sparks: You're missing your party.
Billy Sparks: But I'm having fun.
Sheldon: Do not be alarmed, our mission is one of peace.
Brenda Sparks: I'm gonna go have a little chat with your mother.
Sheldon: Seems unlikely; my mother's on Vulcan.
Billy Sparks: My mom is on Valium.

Congregation: [singing] Heart of my Own heart
Billy Sparks: [singing] Old MacDonald Had a farm
Congregation: Still be my Vision O Ruler of all
Billy Sparks: E-I-E-I-O.

Dr. John Sturgis: So if Einstein's analysis of time is correct, the future's already happened, but we'll discuss that in more detail next week.
Sheldon: Or perhaps we already have.
Dr. John Sturgis: Exactly. [laughs]
Meemaw: Good one.