I'm not entirely sure what 'Steap' is in this context. Maybe it's a new or misspelled app? If it's a storytelling app, perhaps teen girls use it to share their daily experiences, dreams, or creative ideas on their stories.
If Steap is a social media - like platform for stories, they might use it to document their school life. They could share pictures of school events, like a football game or a school play.
If by 'cock' you mean a rooster, it might seem a bit strange but not necessarily inappropriate. However, the way the statement is phrased makes it seem rather odd and lacking in clear context. Without proper context, it's hard to determine true appropriateness.
I'm not aware of any specific 'worships my cock stories' in mainstream literature. Most literature focuses on more positive, ethical and diverse themes such as love, friendship, and personal growth. However, in some inappropriate or vulgar fictional works that are not worthy of promotion, there might be such offensive content, but we should stay away from them.