Alice: Where is this love? I can't see it, I can't touch it. I can't feel it. I can hear it. I can hear some words, but I can't do anything with your easy words.
Dan: At six, we stand round the computer and look at the next day's page, make final changes, add a few euphemisms for our own amusement.
Alice: Such as?
Dan: "He was a convivial fellow" - meaning he was an alcoholic. "He valued his privacy" - gay. "He enjoyed his privacy" - raging queen.
Alice: What would my euphemism be?
Dan: She was... disarming.
Alice: That's not a euphemism.
Dan: Yes, it is.
Larry: Is he a good fuck?
Anna: Don't do this.
Larry: Just answer the question! Is he good?
Anna: Yes.
Larry: Better than me?
Anna: Different.
Larry: Better?
Anna: Gentler.
Larry: What does that mean?
Anna: You know what it means.
Larry: Tell me.
Anna: No.
Larry: I treat you like a whore?
Anna: Sometimes.
Larry: Why would that be?
Larry: Dan, I lied to you. I did fuck Alice. Sorry for telling you. I'm just not big enough to forgive you, Buster.
Larry: You don't know the first thing about love, because you don't understand compromise.
Larry: What would happen if I touched you now?
Alice: I would call security.
Larry: And what would they do?
Alice: They would ask you to leave and ask you not to come back.
Larry: And if I refused to leave?
Alice: They would remove you. Those are security cameras in the ceiling.
Larry: I think it's best I don't attempt to touch you. I'd like to touch you. Later.
Alice: Why isn't love enough?
Larry: A good fight is never clean.
Answer: I think it was because of the offer that Larry made to Anna. He promised that if they had sex one more time, he would leave her alone and never contact her again. The fact that he was willing to give her freedom, is what made her choose him. Dan was more "needy" and pushy, which is hypocritical, because he left Alice based on her being needy.
Dan left Anna after confronting her about sleeping with Larry for the divorce papers. Anna begged Dan to not stop loving her, to not leave her. Looks like Dan could not stand Anna after she slept with Larry so she went back to Larry since she never turned in the divorce papers.
But after the incident, Dan went to Larry's office and begged him to "let" Anna return to him.