Howard: (Singing) Bernadette, I am so sorry for... trying to propose to you. Bernadette, you found it creepy, but... that's just the kind of thing I do...Aaaaaaaaahhh. I know now it's too soon to talk of love, it was just a crazy idea that came to me in my tub. Bernadette, give me one more chance, Sweet Bernadette. I'll get the hang of this thing they call romance, Sweet Bernadette. I dream to once again kiss your lips, Sweet Bernadette. Sincerely Yours, Howard Wolowitz! Bernadette. (Song Ends) Thank you, Cheesecake Factory.

Howard: You know, I'm really glad you decided to learn Mandarin.
Sheldon: Why?
Howard: Once you're fluent, you'll have a billion more people to annoy instead of me.

Howard: So you can never take it (the sweater) off?
Leonard: No.
Raj: Not even to sleep?
Leonard: No.
Howard: So you're just an idiot?
Leonard: It's called proving a point.
Howard: Is the point you're an idiot?

Bernadette: Maybe we should get one of those machines to help her up the stairs.
Howard: You mean a fork lift?

Barry Kripke: Hey, Cooper. I hear you're going to be on the radio with Ira Flatow from Science Friday next week.
Sheldon: Thank you, Kripke, for depriving me of the opportunity to share my news with my friends.
Barry Kripke: My pleasure.
Sheldon: My thanks were not sincere.
Barry Kripke: Ah, but my pleasure is.

Sheldon: What are you talking about?
Leonard: The cultural paradigm in which people have sex after 3 dates.
Sheldon: I see. Now, are we talking date the social interaction or date the dried fruit?

Sheldon: Biologically speaking, Howard is perfectly justified in seeking out the optimum mate for the propagation of his genetic line. Howard: Thank you, Sheldon. Sheldon: And whether that propagation is in the interest of humanity is, of course, an entirely different question.