a one-way ticket to something: o que isso significa?

Imagine you're at a party when you take notice of people using drugs around you. The friend you came with seems curious to know what it would feel like to do drugs for the first time. You think that's a terrible idea. Here's what you tell him: Dude, experimenting with drugs is a one-way ticket to addiction. You shouldn't try it at all.

If something like using drugs is a one-way ticket to an unpleasant situation, it means it will cause that situation to happen. For example, many people say "one-way ticket to hell" when they want to talk about a very bad situation you're going to have to deal with for the rest of your life if you make a bad decision. It's like a trip you take to a very bad place with no going back. That's very bad huh? Talk to you next time!