"Like religion, politics, and family planning, cereal is not a topic to be brought up in public. It's too controversial"

This quote by Erma Bombeck is a funny way of stating that talking about particular subjects in public can be controversial and lead to differences. She is comparing the subjects of faith, politics, and household preparation to cereal, which is a relatively harmless topic. Nevertheless, she is indicating that even talking about cereal can be questionable, as individuals have different viewpoints and choices. This quote is a pointer that it is best to prevent going over certain subjects in public, as it can result in arguments and disagreements. It is also a pointer to be mindful of the subjects we bring up in public, as even apparently safe subjects can be controversial.