Carla: What are you up to, baby?
Turk: Using all my down time to study medicine, so I can prove to Dr. Cox I am not just another dumb surgeon, but every time I crack open these books my brain says: "Who cares about this crap?" Then I wonder if we have any frozen sugar-free fruit juice pops at home.
Carla: I'm gonna help you study tonight, and for every right answer that you get I'm going to you a bite of frozen fruit juice pop, or if you prefer I can remove an item of clothing.
[later that night, Carla is shirtless as she and Turk study on the couch:]
Carla: Okay. A major indicator of hypokalemia is...
Turk: A potassium level under 3.5.
Carla: Right! And here comes your reward.
[Carla reaches behind her bra]
Turk: Yeah, come to daddy!
[Carla hands Turk a blue fruit juice pop]
Turk: Say baby, what happened to your shirt?
Carla: Oh, Izzy spit up on me earlier.
Turk: How come you didn't put a new one on?