My father always said you hadn't finished putting on your pants in the morning if your pocket knife wasn't in your pocket. I grew up with a barlow knife in my pocket though today it has gone away I still carry a jackknife all the time.

By the way, thread creep continues, does everyone know that the pen knives featured in so many songs was the knife kept on hand by the literate to sharpen their quil pens. That is why only the upper class kill with a pen knife in the old songs. The lower class had to rely on other deadly instruments.