My first grey hair :-)

Um….. it is time for me to realize that I am getting old I guess. I have got my first grey hair and believe it or not I have taken its picture. It will be daft if I upload that picture. I am thinking, am I that old or is it because I am thinking too much or is it because a mixture Garnier Fructis, Head n Shoulders, Dove and Himalaya shampoo for a week can cause some greyness? I prefer to choose the third option.