Why do we want what we cant have?

WE WANT WHAT WE CAN'T HAVE BECUASE ITS NOT THERE ALL THE TIME A MAN WHO IS ALWAYS THERE FOR YOU AND WILL DO ANYTHING FOR YOU IS KIND OF A TURN OFF SOMEHOW JUST LIKE WITH MEN THEY DON'T WANT SOMEBODY AVAILABLE ALL THE TIME BECAUSE WHAT ARE THEY WORKING FOR MEN AND WOMAN LIKE A CHALLENGE SO IF SOMEONE YOUR WITH DOESN'T GIVE YOU THAT, YOU REALLY DON'T STAY INTERESTED.

because we dont know what is best for us from our own perspective we see what we want not what we need