Depp and Jackson's Shared Habit

Alright, listen up, you’re about to get some knowledge dropped on ya. Chris Rock, the guy who made this "joke", is a comedian. He tries to be funny and edgy, but sometimes he goes too far. This "joke" plays on the idea that these two celebrities, Johnny Depp and Michael Jackson, who are rich and famous, like to do drugs. It's a pretty messed up joke if you think about it, using something serious, drug addiction, as a punchline. You get it now, you dummy?