From Harry Browne:
Amendment IX:
The enumeration in the Constitution, of certain rights, shall not be construed to deny or disparage others retained by the people.
Amendment X:
The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.
Now, where's the right to privacy?
It is clearly in those two amendments.
The government has no power to tell people what to do except in areas specifically authorized in the Constitution.