As a parent of a child that has actually done self harm and is actually hospitalized right now due to a potential situation from earlier this week (thankfully avoided it this time), she would never see or hear your song. I haven’t private messaged you to see your lyrics. As you note, there are insane amounts of discussion and content online about self harm that are far more accessible to people considering self harm than this forum. There does appear to be evidence of some power of suggestion as it pertains to self harm, but I seriously doubt whatever your lyrics are will salt the ocean of already available content by any measurable amount.