Answer:
I am owned by every man though my length differs. Their wives uses me after getting married.
I am the outstretched fingers that seize and hold the wind. Wisdom flows from me in other hands. Upon me are sweet dreams dreamt my merest touch brings laughter.
I belong to everyone. Sometimes make you happy, sometimes make you sad. I will never end until the day you do. What am I?
I only exist when you are here. Where you never were I can never be.
I move without wings, between silken strings. I leave as you find my substance behind. What am I?
What is yours but only used by others?