Prison can be a scary place. Max an Caroline find this out on the 2/27/12 episode of 2 Broke Girls.
Added:

2 Broke Girls Season 1 Episode 18 Quotes

I guess I am your BFF.. Broke Friend Forever.

Max

Caroline: It's strictly business.
Max: Alright, but it's costing us 200 dollars, might as well get something out of it. Maybe let him browse your Yahoo.