Rape is a crime of power. This argument states that rape is not sex, but merely a form of violent domination of one person by another. An example of this argument is prison rape. Men rape other men in prison not for sexual gratification, but to control newcomers by forcing them to submit to a stronger prisoner. Another example of this is stranger rape.
Rape is a crime of sex.
This argument states that rape is indeed sexually motivated and that power and control are not the main elements. An example of this argument states that in acquaintance rape situation, sex may be planned, but not rape. When sex is taken without consent, it is for sexual gratification only. This argument is currently a very controversial one.