I don't know if this has been said already, but...
You know you're addicted when you go into "danmaku" mode when navigating through crowds of moving people
It probably has been at least once, but don't worry, we all do it once in a while.
In fact, I actually said "graze" rather quietly everytime I came close to one of the cooks while going down the line at work. Not loud enough so someone else could hear it, and a little later, I actually made the little tick noise when you graze.