Leonard: Damnit.
Priya: Wow, Leonard, already?
Leonard: No no no. The screen froze.

There's no junk jiggling; we just talk.

Leonard

I miss the old days when your romantic partners could be returned to the video store.

Sheldon

Give it a second to load. Whenever you're ready AT&T!

Sheldon

I had trouble putting it on and you tried to help and ... that's all she wrote.

Raj

You can't ruin a friendship with sex that's like trying to ruin ice cream with chocolate sprinkles.

Raj

Buck up, sissy pants.

Leonard's mother

You can't blame yourself. When your prefrontal cortex fails to make you happy promiscuity rewards you with the needed flood of dopamine. We, neurobiologists, refer to this as the skank reflex.

Amy

I feel like two totally different people. Dr. Jekyyl and Mrs. Whore.

Penny

The Big Bang Theory Season 5 Quotes

Sheldon: Hummingbirds are the vampires of the flower world.
Raj: Still my first choice for an ankle tattoo. Or, a dolphin -- I go back and forth.

Sheldon: Professor Hawking, it's an honor and a privilege to meet you, sir.
Stephen Hawking: I know.