Amy: So Sheldon, there's something I've been wanting to talk about but I know it's kind of a touchy subject.
Leonard: Way to narrow it down to everything.

Penny: Wait a minute. You mention his birthday and he vanishes?
Leonard: Well, where's that information been this whole time?

Penny: Yeah, what is the problem? Is it about getting older?
Sheldon: Please! Look at this porcelain skin. I'm like a human sink.

Leonard: Can I get his contact info?
Stuart: Sure, uh, but just so you know, he's kind of a diva.
Leonard: He is?
Stuart: Oh, yeah. Won't take the bus. He won't pack his own lunch. Won't let you spend the night on his couch.

Bernadette: What kind of cake do you like?
Sheldon: Well, my favorite is chocolate with strawberry frosting, three layers, and if there's writing on it, make sure it's not all caps. I don't need my dessert yelling at me.

Raj: Hey, so what was Adam West like on the phone?
Leonard: Uh, nice guy. But it was a little weird to hear Batman say, "Don't ring the doorbell or my poodles will go crazy."

Penny: Thank you so much for helping us, Stuart.
Stuart: Oh, I was just glad to be invited. To be honest, I don't always feel like I'm part of the group.
Penny: Okay, sweetie, we're on the clock here. Can you hate yourself and frost at the same time?

Amy: If I may, I'd like to propose a toast. Um, thank you all for coming tonight. I know it's customary for the birthday boy to receive presents, but I feel like I got the greatest gift the day he was born.
Everybody: Aww.
Raj: Hear, hear.
Sheldon: Amy, that was lovely. You know, this is fun. Let's do more. Someone else say something wonderful about me.

Beverly Hofstadter: Sheldon, I know the future holds great things for you, and we all can't wait to see what they are. Happy birthday, dear.

Leslie Winkle: Leonard. Hey, it's been a while.
Leonard: Leslie. I can't remember the last time we talked. So much has changed.
Leslie Winkle: Has it?
Leonard: Yeah, uh, um, Penny and I got married.
Leslie Winkle: Wow, congratulations. You know, actually, I thought you'd be living with Sheldon forever.
Leonard: Yeah, .... Well, don't be a stranger.

Penny: Okay, while they get the cake, Sheldon, I just want to say, I hope you didn't think you were gonna get through tonight without a hug.
Sheldon: You know, I used to hate these hugs. Now they're just extremely irritating.

Sheldon: What is it?
Amy: Well, your birthday's coming up and you've never let us celebrate it. And I was hoping maybe this year we could.
Sheldon: Oh, I suppose that's a discussion we could have. (Sheldon runs back up the stairs)
Amy: Okay, great, I mean, it doesn't have to be a big party or anything. I was just - Where'd he go?

Sheldon: Very well. You may celebrate my life by throwing a party with cake, presents and a shower of admiration and love. But then you owe me big-time.

Leonard: Hey, uh, you know, he told a sad story about how his sister tricked him into thinking Batman was coming to his party.
Howard: That's funny. Let's do that.

Penny: All right, what about music?
Sheldon: I enjoy marching bands and Tibetan throat singing.
Penny: No music it is.