Justice Blackmun's dissent quoted Stanley v. Georgia and Katz v. U.S. to no avail.  
Justice Powell provided the pivotal fifth vote for this decision, but added a concurrence stating his concern that the statute in question would fail an Eighth Amendment challenge.  Justice Blackmun's dissent quoted Stanley v. Georgia and Katz v. U.S. to no avail.  Fourteen years later, the state then defending the constitutionality of its law ruled it incompatible with its own constitution, and the Georgia's attorney general's gubernatorial campaign sputtered on allegations of infidelity.  FTP, name this controversial 1986 Supreme Court case upholding laws against consensual sodomy.
Justice Powell provided the pivotal fifth vote for this decision, but added a concurrence stating his concern that the statute in question would fail an Eighth Amendment challenge.  
Bowers v. Hardwick (accept either name)