MODEL PENAL CODE
(1) Offense Defined. A male who has sexual intercourse with a female not his wife, or any person who engages in deviate sexual intercourse or causes another to engage in deviate sexual intercourse, is guilty of an offense if:
(a) the other person is less than  years old and the actor is at least  years older than the other person; or
(b) the other person is less than 21 years old and the actor is his guardian or otherwise responsible for general supervision of his welfare; or
(c) the other person is in custody of law or detained in a hospital or other institution and the actor has supervisory or disciplinary authority over him; or
(d) the other person is a female who is induced to participate by a promise of marriage which the actor does not mean to perform.
(2) Grading. An offense under paragraph (a) of Subsection
(1) is a felony of the third degree.
Otherwise an offense under this section is a misdemeanor.