Talk:Kenny McCormick/@comment-26439203-20150511212759/@comment-27412810-20151217034832

Both of my parents have black hair and I still have blond hair! I'm about 20 now... Lucky it hasn't darkened yet. Similar to Tweek's parents neither of them have blond hair but he does! It could most likely be an old genetic trait that skipped one or both of the parents and was passed on from ancestors to Tweek and Kenny. The other idea is parents were at one time blond but their hair darkened over time. Regardless it's caused by genetics.