Raj: I need a hug.
Sheldon: Sorry, I have company.
Raj: Come on, Sheldon, open the door.
Sheldon: I don't want to hug you.
Raj: I don't want to hug you, either. I was just feeling blue.
Sheldon: Blue, as in depressed?
Raj: Well, not so much depressed as lonely.
Sheldon: I don't know what color lonely is.