You are in deep crap in Oregon:
"163.315 Incapacity to consent; effect of lack of resistance.
(1) A person is considered incapable of consenting to a sexual act if the person is:
(a) Under 18 years of age;
(b) Mentally defective;
(c) Mentally incapacitated; or
(d) Physically helpless.
(2) A lack of verbal or physical resistance does not, by itself, constitute consent but may be considered by the trier of fact along with all other relevant evidence. [1971 c.743 §105; 1999 c.949 §2; 2001 c.104 §52]'
"163.415 Sexual abuse in the third degree.
(1) A person commits the crime of sexual abuse in the third degree if the person subjects another person to sexual contact and:
(a) The victim does not consent to the sexual contact; or
(b) The victim is incapable of consent by reason of being under 18 years of age.
(2) Sexual abuse in the third degree is a Class A misdemeanor.
"163.435 Contributing to the sexual delinquency of a minor.
(1) A person 18 years of age or older commits the crime of contributing to the sexual delinquency of a minor if:
(a) Being a male, he engages in sexual intercourse with a female under 18 years of age; or
(b) Being a female, she engages in sexual intercourse with a male under 18 years of age; or
(c) The person engages in deviate sexual intercourse with another person under 18 years of age or causes that person to engage in deviate sexual intercourse.
(2) Contributing to the sexual delinquency of a minor is a Class A misdemeanor. [1971 c.743 §117]
"163.445 Sexual misconduct.
(1) A person commits the crime of sexual misconduct if the person engages in sexual intercourse or deviate sexual intercourse with an unmarried person under 18 years of age.
(2) Sexual misconduct is a Class C misdemeanor. [1971 c.743 §118]
These can all be found at:
http://www.leg.state.or.us/ors/163.html