Comedy works because it’s fast, it’s smart and it’s unexpected — all of the things sequels usually tend to be the antithesis of.
Which brings us to the royal edict of comedy films: you don’t always need a sequel.
The thrill of the unknown is gone, and the temptation to go bigger/harder with the jokes from the previous film is always there.
Making a sequel to a comedy gives into one of the most dirty, human impulses of all: stretching a joke that everyone in the room loved in order to stay at the center of the attention.