After the incident with the dead rat in the Gucci bag, Susan was understandably suspicious of her "birthday present".
Horror movie rule # 31 Don't open the bag.
Nobody ever told Peaches that her moo-moos actually made her look fatter.
Yeah, it's swell. May I have my paper bag back now, please?
You can let the cat out of the bag, but the cat might not come out.