Elena: (referring to Stefan) You stood there and let him feed on an innocent girl.
Damon: I didn't let him do anything. If you want to get nitpicky about it, I made him.
Elena: Why would you do that?
Damon: Because we're vampires, Elena. We need human blood to survive. We're predators, not puppies.
Elena: Well, Stefan found a way around it before.
Damon: Stefan just built himself a delusional wagon which he's repeatedly fallen off of. What he needs to learn is control.
Elena: He was able to manage when he was drinking my blood. Small amounts every single day.
Damon: Ah, yes! Back when you two were in love and it was all rainbows and unicorns.