"In the 1980s, when Roe's privacy analysis became central to constitutional arguments for gay rights, Blackmun's reactions were puzzling. In a New York case, he initially voted with the four most conservative justices to hear arguments, but shifted sides and helped dismiss the case because he wanted to wait for one that directly addressed the "deviant sex issue." In 1986, Bowers v. Hardwick did just that. Michael Hardwick had been arrested under Georgia's antisodomy law for having oral sex in his bedroom with another man. At first the justices seemed ready to strike down the statute by a vote of 5 to 4, with Powell among the majority. But Powell, a consistent supporter of Roe, changed his vote after deciding that the constitutional right to privacy should not cover gay sex. Powell's switch meant that the court would uphold the statute, turning what would have been a majority opinion by Blackmun into a dissent. Clerk Pamela Karlan, now a professor at Stanford Law School, took the lead in preparing the dissent, which argued that "the right of an individual to conduct intimate relationships in the intimacy of his or her own home seems to me to be the heart of the Constitution's protection of privacy.""
January 1, 1970
https://en.wikiquote.org/wiki/Privacy