What about blood transfusions? As a result of my military career, I've had nine pints of blood transfused into me. The human body only holds around six pints.
Since that time, I have mellowed and become more altruistic. I thought that it must be a result of getting older, becoming more mature.
But is it? Or are these new traits, ones that might be more common in blood donors, something that was transfused into me?
Chances are, we'll never know.