Physical traits drives a characters actions in short stories
Satire often takes the form of exaggeration and irony.
TO add, satire is the use of humor, irony, exaggeration, or
ridicule to expose and criticize people's stupidity or vices, particularly in
the context of contemporary politics and other topical issues.
Answer:
they kept it a secret so they wouldn't know how old they where or when was there birthday because if they knew then they knew then maybe they would want a celebration or a day off work