Whether we like it or not, we are a genetic combination of our parents and their parents, and their parents, and so on. We are a genetic mixture that creates a new unique person that just happens to have some of the very traits of the people that created us - hair color, height, even the way we fold our hands is genetically inherited from our parents. Our parents are also to blame for freckles, the ability (or lack of) to roll our tongues, whether or not we have dimples, and whether or not you may develop light bladder leaks. All of these things can be attributed to genetic influence. Yes, you read that right. In addition to blaming your parents for your poor eyesight and a terrible sense of direction, you may also be able to add those involuntary leaks that happen when you sneeze, but only partly.