Well, there are lots of activities that can trigger dopamine release: listening to your favourite band, making love, shopping, smelling cookies baking in the oven even. So, you basically switch to one of those, and you are fine. That's what I do, anyway.
I agree, that is why I divert myself to other dopamine-producing activities
such as playing games when I feel that I am too hooked on my gambling activities.
Yeah, games. Great example. I forgot about it because I myself don't play video games, maybe because no dopamine release is triggered when I play, but, of course, for people who enjoy it, that would be a good substitution.
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Usually I don't really believe anytime or something I do read up on internet which do tell something which is out or doesn't have sense nor correlating or being realistic.
15 months is too long yet addiction to gambling could even happen immediately. Idk, maybe they are talking about some severe addiction, and for that kind of addiction to develop it takes 15 months, but from my experience 3-4 weeks is enough for finding yourself in a situation when you start thinking, "Am I addicted?"