Section 263.15 does not prohibit the knowing sale or promotion of any film, or other item, in which a child has performed a dangerous stunt or where production required a child to engage in any of the numerous activities which the Legislature in the exercise of its police power has determined is dangerous to the health or well-being of child employees or employees generally (see, e.g., Penal Law, § 260.10, subd 1; Labor Law, § 130 et seq.; Education Law, § 3215 et seq.; § 3228 et seq.; cf. Penal Law, § 245.05, subds 2, 3). The severe penalties imposed by section 263.15 of the Penal Law are reserved for those who promote plays, films, books and photographs, dealing with adolescent sex in a nonobscene manner. Thus to the extent that section 263.15 is designed to protect child employees from engaging in acts which the Legislature has found to be dangerous to their well-being the statute is "strikingly underinclusive" (Erznoznik v City of Jacksonville, 422 U.S. 205, 214). In short, the statute discriminates against films and other visual portrayals of nonobscene adolescent sex solely on the basis of their content, and since no justification has been shown for the distinction other than special legislative distaste for this type of portrayal, the statute cannot be sustained (Erznoznik v City of Jacksonville, supra, at p 215)."