itch.io

Per the Merriam-Webbster dictionary definition of Rape:

unlawful sexual activity and usually sexual intercourse carried out forcibly or under threat of injury against a person's will or with a person who is beneath a certain age or incapable of valid consent because of mental illness, mental deficiency, intoxication, unconsciousness, or deception

At no point in that definition or any other definition they provide does it state what sexually activities specifically count as rape. 

Likewise, the Cornell Law School's Legal Information Institiute describes Rape thusly:

(a)Rape.—Any person subject to this chapter who commits a sexual act upon another person by—

(1)using unlawful force against that other person;

(2)using force causing or likely to cause death or grievous bodily harm to any person;

(3)threatening or placing that other person in fear that any person will be subjected to death, grievous bodily harm, or kidnapping;

(4)first rendering that other person unconscious; or

(5)administering to that other person by force or threat of force, or without the knowledge or consent of that person, a drug, intoxicant, or other similar substance and thereby substantially impairing the ability of that other person to appraise or control conduct;

is guilty of rape and shall be punished as a court-martial may direct.

At no point in the legal definition of rape is it specified what act counts as rape so long as it is sexual in nature. Moreover, it DOES explicitly consider a sexual act committed upon an unconcious person to be rape