[The Texas anti-sodomy statute] undoubtedly imposes constraints on liberty. So do laws prohibiting prostitution, recreational use of heroin, and, for that matter, working more than 60 hours per week in a bakery. But there is no right to 'liberty' under the Due Process Clause, though today's opinion repeatedly makes that claim.... The Fourteenth Amendment expressly allows States to deprive their citizens of 'liberty,' so long as 'due process of law' is provided....

On the right to sodomy: Lawrence v. Texas (2003) (dissenting)