Some boys have a porn stash that they have to hide from their mothers or girlfriends. I have kept a collection of erotic novels throughout my adult life. I didn’t use them when I first discovered how to orgasm through masturbation. But later I enjoyed having a variety of fantasy scenarios. I used some of these stories over decades because they were effective in generating arousal. But I have never met another woman who does the same. I don’t see how female orgasm can be common in the population!