Billy Sparks: Do you think my mom and your dad are going to be boyfriend and girlfriend?
Missy: No.
Billy Sparks: If they got married, would that make us brother and sister?
Missy: It's not gonna happen.
Billy Sparks: Luke Skywalker and Princess Leia were brother and sister, and they still kissed. [Missy scoffs] I didn't write it. [Missy scoffs again]

Billy Sparks: Who's Melissa?
Missy: Me.
Billy Sparks: Then who's Missy?
Missy: "Missy" is short for "Melissa." Like how "Billy" is short for "William."
Billy Sparks: I don't understand.
Missy: You know how your real name is William?
Billy Sparks: I'm Billy.
Sheldon: No, we call you Billy, but your real name is William.
Billy Sparks: But my underpants say "Billy" in them. Mom, is my name William?
Brenda Sparks: [sighs] Yeah.
Billy Sparks: Then whose underpants am I wearing?

Billy Sparks: Hello.
Herschel Sparks: Hey.
George: Hey, Billy.
Billy Sparks: Was this fence window always here?
Herschel Sparks: No, son, that's a new fence window.
Billy Sparks: Anybody else getting dizzy?

Sheldon: How do we love our neighbors when our moms hate each other?
Billy Sparks: Who does your mom hate?
Sheldon: Your mom.
Billy Sparks: Hey, my mom hates your mom. Small world.

Sheldon: You've been through this before. How long does it take?
Brenda Sparks: Depends. With Billy, it was days.
Sheldon: Well, he always has been a tad slow.

Sheldon: You know, in a way, you and I are having a very similar day.
Mandy: Really? How might that be?
Sheldon: I'm also bringing something new into the world. Although mine does not involve my privates being inspected my strangers.

Sheldon: All right, let's do this.
Mandy: Why are you wearing dish gloves?
Sheldon: To deliver the baby.
Mandy: That is not happening.
Sheldon: Good. Whew. Can I get a glass of water?
Mandy: Sheldon, I need to go to the hospital.
Sheldon: Well, I can't drive. I do have a bike, but you'll never fit in the wagon.