"Grooming" is nothing more than establishing a relationship and rapport with the aim being naked pics and ultimately in-person sex. The difference is the target here is a child, and thus more easily manipulated.

Just ask any of your attractive of-age female friends how many times they get harassed on social media by random guys they don't know if they have their DMs open. Which they probably don't.

My point is these people are acting like many horny guys on the internet. The difference is their targets are kids, but that doesn't make them psychopaths, it makes them pedophiles.