Yes, it was LAWRENCE V. TEXAS (02-102) 539 U.S. 558 (2003) that declared laws punishing private adult consensual sex to be unconstitutional. Some laws still use the term "sodomy" to prohibit sex that involves force or intimidation, minors, or those unable to demonstrate informed consent.<quoted text>
Sodomy laws are unconstitutional, and therefore void, unless the act is not in a place where privacy is a reasonable expectation. I believe the court case was Lawrence, but I'm not sure. So no one is gong to be arrested for sodomy if it is in a private place between two consenting adults.
"Lawrence v. Texas is important for many reasons. Thirteen states still have laws prohibiting private, consensual homosexual activity. These laws are now clearly unconstitutional. The decision is obviously an enormous victory for advocates of gay and lesbian rights. More generally, the decision is the strongest to date by the Supreme Court of a fundamental right of adults to engage in consensual sexual activities." http://web.law.duke.edu/publiclaw/supremecour...
My favorite quote from Lawrence v:
"Had those who drew and ratified the Due Process Clauses of the Fifth Amendment or the Fourteenth Amendment known the components of liberty in its manifold possibilities, they might have been more specific. They did not presume to have this insight. They knew times can blind us to certain truths and later generations can see that laws once thought necessary and proper in fact serve only to oppress. As the Constitution endures, persons in every generation can invoke its principles in their own search for greater freedom." (Justice Kennedy in Lawrence.)
Again, "They knew times can blind us to certain truths and later generations can see that laws once thought necessary and proper in fact serve only to oppress."
Hopefully he will remember this when he considers marriage equality.