Oregon Revised Statutes Crimes and Punishments § 163.465

(a) An act of sexual intercourse;

(b) An act of deviate sexual intercourse; or

(c) An act of exposing the genitals of the person with the intent of arousing the sexual desire of the person or another person.

(2)(a) Public indecency is a Class A misdemeanor.

(b) Notwithstanding paragraph (a) of this subsection, public indecency is a Class C felony if the person has a prior conviction for public indecency or a crime described in ORS 163.355 to 163.445 or for a crime in another jurisdiction that, if committed in this state, would constitute public indecency or a crime described in ORS 163.355 to 163.445.