Life is the most precious thing you'll ever have because it's finite. Unbeknownst to us, from the moment we are born, we each get a limited number of heartbeats. Of course, the exact number is subject to change, based on health issues, external environmental factors, and good old fashioned bad luck.
Assuming you aren't born with a heart defect, you don't develop any life-threatening illnesses, or ultimately live out an episode of looney toons, how many heartbeats should you get? Millions, maybe billions?