You're making assumptions about literally thousands of people who have at some point or at some point will SH based on what you're seeing a couple people talk about on a meme website. If that's not immature, idk what is.
You should all shut up about self-harm and masochism and shit. You can't make assumptions based on what you think is weird. This is not at all defending SH, but what I'm trying to say is that if you haven't experienced harming yourself or been in a position to do so, you don't deserve to have an opinion on it.