They made no assumptions about the content. They simply expressed a distaste for the cover.
To continue the analogy, there are plenty of physics textbook manufacturers, and not all of them decide to use sex to sell their textbooks. Choosing to not engage with a blatant marketing tactic and picking another textbook is a perfectly valid action for someone of any age.
To continue the analogy, there are plenty of physics textbook manufacturers, and not all of them decide to use sex to sell their textbooks. Choosing to not engage with a blatant marketing tactic and picking another textbook is a perfectly valid action for someone of any age.