Whether the number is one or one hundred is irrelevant. The fact that anyone could be prosecuted under this law is antitheical to individual liberty.
Besides that, as Justice Kennedy very eloquently explain in his opinion, the law had a far wider reach than merely the number who may be prosecuted. The anti-sodomy law was used as the basis for a pervasive stigma. It also was intrusive in that any arrest or conviction under the law could have implications in a person's employment. The statute also allowed a person to be declared an unfit parent per se in custody disputes.
Just for some things, huh?
DUH...