I can say Water is a gateway drug to pepsi. Pepsi is a gateway drug to beer. Beer is a gateway to vodka. Vodka is a gateway to speed. Speed is a gateway to crack. Crack is a gateway to heroin. Saying it doesn't make it so.
Sorry, but the gateway drug myth has been specious speculation for a long time. But best to be careful and watch out for...
REEFER MADNESS!!!