The other day I woke up and my wife could tell I was obviously worried about something. She turned to me and asked: "What is it?" I responded with: "There are only 100,000,000* social security numbers (including all zero's) but the population of the United States is over 300,000,000... What does this mean?" She gave me that look which means "this is why you don't have more friends" and a hug, and we had breakfast with the kids. *I later realized there are 1,000,000,000 numbers and there is no issue with population size. Just goes to show you should wake up fully before you try and think numbers.