Savile at School

Alright listen up buttercup. So, Jimmy Savile was a real-life dude who did some not-so-cool things with kids. The joke implies Savile gets a kick out of being around kids at a primary school, but it's messed up because of what he did. It's funny because it's so wrong, which makes it dark humor. You probably need to google Jimmy Savile to get the joke, and you should, because you are a moron.