• I open paths for all to see,
    to do this taks is for me to be,
    I come in many a shape and size,
    and oft am gone before you realise,
    I am common yet rare,
    and can be ugly or fair,
    I can cost little or a great fee,
    you all have at least one of me,
    By my crooked head, I live or die,
    I twist and turn, what am I?