It is unlawful for any person knowingly to exhibit for a monetary consideration to a minor or knowingly to sell to a minor an admission ticket or pass or knowingly to admit a minor, whether or not for a monetary consideration, to a place of public accommodation where there is exhibited a motion picture, show or other presentation or a play, dance, or other exhibition presented before an audience which, in whole or in part, depicts nudity, sexual conduct, or sadomasochistic abuse and which is harmful to minors.