If you keep rewinding and pausing a movie because you think you might have seen a glimpse of a knife or a barely visible pocket clip.
If you know the type of steel of every single knife you own, but can't remember your anniversary or wife's b-day.
If you frequently drop several hundred dollars on a knife without blinking, but freak out if the price of gas goes up 0.01 cents per gallon.
If you intentionally wear your worst worn out shirts and pants with high hopes you will find an errant thread that needs cutting.
If you break out your machete/survival-type knife for the most mundane kitchen tasks. (Some cheeses are seriously tough.)
If you have ever looked at yourself in a mirror holding a knife, just to see how awesome it looks in your hand.
If your non-knife-guy buddy asks to borrow your knife and you cringe, because you just KNOW he's gonna use it as a screwdriver.
If you rotate your EDC religiously, but can't remember how many days it has been since you last changed your socks or underwear.