The Bath Item Gift Hypothesis

Penny: Hey Sheldon. Are you and Leonard putting up a Christmas tree?

Sheldon Cooper: No, because we don't celebrate the ancient pagan festival of Saturnalia.

Penny: Saturnalia?

Howard Wolowitz: Gather round, kids, it's time for Sheldon's beloved Christmas special.

Sheldon Cooper: In the pre-Christian era, as the winter solstice approached and the plants died, pagans brought evergreen boughs into their homes as an act of sympathetic magic, intended to guard the life essences of the plants until spring. This custom was later appropriated by Northern Europeans and eventually it becomes the so-called Christmas tree.

Howard Wolowitz: And that, Charlie Brown, is what boredom is all about.

Penny: Dave is not smarter than you. He's an idiot.

Leonard Hofstadter: Really? (smiling) Why would you say that?

Penny: Because a smart guy takes the nude photos of his wife off his cell phone before he tries to take nude photos of his girlfriend.

Leonard Hofstadter: He tried to take nude photos of you?

Penny: That's what you took from that?!!

Sheldon Cooper: (after opening Penny's gift) Oh... a napkin...

Penny: Turn it over.

(he does, and is so shocked that he has to grab the chair to keep from falling over)

Sheldon Cooper: "To Sheldon, live long and prosper... Leonard Nimoy."

Penny: Yeah, he came into the restaurant. Sorry the napkin's dirty. He wiped his mouth with it.

(Sheldon stands up quickly, shocked again)

Sheldon Cooper: I possess the DNA of Leonard Nimoy?!

Penny: Well... yeah, yeah, I guess. But look, he signed it!

Sheldon Cooper: (very excited) Do you realize what this means? All I need is a healthy ovum and I can grow my own Leonard Nimoy!

Penny: Okay, all I'm giving you is the napkin, Sheldon.

Penny: (after getting several gift baskets) Sheldon, what did you do?

Sheldon Cooper: (worried) I know! It's not enough, is it? Here...

(he slowly and awkwardly hugs Penny, who is completely shocked)

Penny: Leonard, look! Sheldon's hugging me!

Leonard Hofstadter: It's a Saturnalia miracle!