The sense in your stomach is adrenaline release, followed by the dopamine high. It's very powerful and highly addictive. You won't get that feeling from anything else so you will desensitize and build a tolerance to it. I have a hard time with delaying gratification so I don't have any good advice on how to stop. There's nothing wrong with it though, we are hardwired for the feedback loop. Of course the only way to stop is to stop.