In erhaps the most ridiculous situation, Sheldon ends up sleeping in Penny's bed... and somehow this doesn't make the man happy! We'll trade places with you...
Added:
When Sheldon crashes in on Stuart (Kevin Sussman) and Penny's date, he ends up arguing with Stuart on comic books until they put Penny and Stuart's chances of getting lucky to sleep.
Added:
Stuart (Kevin Sussman) flirts with Penny as he givers her a portrait he drew of her in exchange for her phone number. Wow, Penny is falling for the nerds hardcore now.
Added:
Stuart (Kevin Sussman) comes over to offer help to Leonard and Penny as they attempt to pick up a comic book for Penny's nephew. Stuart is nice... for a guy who likes comic books.
Added:
Penny gets ready for a showdown with Alicia (Valerie Azlynn) by stepping up her wardrobe and wearing a little dress to compete with her clear superior for the guys' affection.
Added:
Penny meets Alicia (Valerie Azlynn) while wearing an embarrassing Hillary Clinton shirt. Embarrassing because the shirt is not flattering, not for political reasons. We don't judge.
Added:
Penny brings in Chinese for the guys and hangs out in her sweats. Don't worry, for now Wolowitz still thinks she looks ravishing. It's only when the new neighbor shows up does Penny need to step it up.
Added:
When Raj, Wolowitz and Leonard ignore Penny in even her hot little dress in favor of the new neighbor, Penny is stuck with hanging out with Sheldon.
Added:

TBBT Quotes

Penny: Here's a question-- as an alien pretending to be human, are you planning to engage in any post-prom mating rituals with Amy?
Sheldon: There are post-prom mating rituals?
Penny: Not always. Unless your date drives a van with an air mattress, then always.
Sheldon: Well, if it's part of the prom experience, then I'm open to it.
Penny: You're kidding.
Sheldon: I may be an alien, but I have urges.If Amy wants to copulate by firing her eggs into space, well, then, I will happily catch them with the reproductive sac on my upper flermin. I'm not the best at reading facial cues, but I can see that you're a little turned on.

Penny, there's only one cookie with something in the middle that solves life's problems, and that's an Oreo. Or a Nutter Butter, if you're in a pinch.

Sheldon