We don't really pick it. Alot of the time, our supernatural refers very explicitly to some relationship to our natural. Which is a long winded way of saying that superstitions are incredibly local. That we easily dismiss the superstitions of others related to the same, and to their lack of a relationship with us and our own environments - the ones you mentioned are out-of-time, for example. I read a wonderful article about workplace superstition, how even small groups of people come up with communal superstitions about what they spend most of their time doing.
I am the Infantry. I am my country’s strength in war, her deterrent in peace. I am the heart of the fight… wherever, whenever. I carry America’s faith and honor against her enemies. I am the Queen of Battle. I am what my country expects me to be, the best trained Soldier in the world. In the race for victory, I am swift, determined, and courageous, armed with a fierce will to win. Never will I fail my country’s trust. Always I fight on…through the foe, to the objective, to triumph overall. If necessary, I will fight to my death. By my steadfast courage, I have won more than 200 years of freedom. I yield not to weakness, to hunger, to cowardice, to fatigue, to superior odds, For I am mentally tough, physically strong, and morally straight. I forsake not, my country, my mission, my comrades, my sacred duty. I am relentless. I am always there, now and forever. I AM THE INFANTRY! FOLLOW ME!
