Cf. Playboy, 529 U.S. Reno, 521 U.S. at 865, 117 S.Ct. 1878 see also Reno, 521 U.S. 639, 88 S.Ct. 1274 ("It is cardinal with us that the custody, care, and nurture of the child reside to start with in the mom and dad, whose major purpose and flexibility incorporate planning for obligations the condition can neither supply nor hinder." (quoting Prince v. Massachusetts, 321 U.S.