Penny: Ah, it's nice having the place to ourselves, isn't it?
Leonard: Uh-huh. Now that Raj is working for Sheldon, I don't have to chauffeur him around anymore. Plus, yeah, with them working late so much, we get some privacy.
Penny: Mm-hmm. Hey, want to get a little crazy?
Leonard: What are you thinking?
Penny: Let's slide over to Sheldon's spot and make out.
Leonard: You are a dirty girl.