Children's shows often include jokes to give a little "nudge nudge wink wink" to grown-ups. I mean, who could forget the subversive bits in Looney Tunes or, say, Pee-wee's Playhouse?
But this compilation by YouTube channel Best of Simpsons Characters is different, because The Simpsons isn't really a show for kids. It's just the Simpsons' jokes that they didn't get when they were little.