Amy: I'll tell you what they think. They think our relationship is a joke.
Sheldon: Well, I don't think our relationship is a joke. I think "a horse goes into a bar, bartender says, why the long face?", that's a joke. It's a good one, too, because a horse has a long face.
Amy: Sheldon, are we ever going to have an intimate relationship?
Sheldon: Oh, my. That's an uncomfortable topic. Amy, before I met you, I never had any interest in being intimate with anyone.
Amy: And now?
Sheldon: And now what?
Amy: Do you have any interest now?
Sheldon: I have not ruled it out.
Amy: Wow. Talk dirty to me.