2011 ORS § 163.465¹
Public indecency

(1) A person commits the crime of public indecency if while in, or in view of, a public place the person performs:

(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 (Rape in the third degree) to 163.445 (Sexual misconduct) 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 (Rape in the third degree) to 163.445 (Sexual misconduct). [1971 c.743 §120; 1999 c.962 §1; 2005 c.434 §1]