Why do many cigarette smokers become cocaine users?

Are the buzzes similar? How is nicotine related to or similar to cocaine? The cigarette buzz isn’t that great IMO. A couple days ago I took 3 really big hits on a Kool regular and I could barely stand up plus I just didn’t feel good. I’ve smoked many a pack of Kool too. Usually I take one big hit after it starts to burn uniformly and I feel a decent buzz after a minute or so. I do not have any desire to do cocaine. All the cocaine users I know are also smokers. Why is that?

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