We can start by strict content screening in the media. Publishers and platforms should have strict guidelines to filter out such inappropriate content. Also, parents and educators need to be vigilant and educate children about what is appropriate and inappropriate reading material.
Well, this kind of content in stories is not suitable for children at all. It can cause psychological trauma to them. Children are in the stage of forming their values and worldviews. Exposure to such abnormal content may make them feel scared, disgusted, and also disrupt their normal psychological development. For example, it might make them have abnormal associations or nightmares.
There is no evidence to suggest that such activities occur in a gym environment. Gyms have rules and ethics in place to maintain a proper and respectful atmosphere for all members. This kind of description violates the basic norms of a public fitness place.
Most literature aims to promote positive social values, and topics like this are not part of the acceptable content in literary works. We should look for stories that are about love, friendship, and moral growth in literature.
I'm not aware of any such stories in mainstream popular culture. Truckers are usually associated with their driving jobs, long hauls, and the trucking industry in general, not such inappropriate or vulgar content.