Just how far have Caroline and Max fallen? This promo for the 10/3/11 episode ought to give fans an idea.
Added:

2 Broke Girls Season 1 Episode 3 Quotes

I do not light up. What you're seeing is probbably radiation from the summer I collected uranium tubes by the railroad tracks.

Max

Caroline: You need to react when people cry
Max: I did! I rolled my eyes!