There is considerable debate as to what constitutes proper and complete consent] in a sexual relationship. How explicit should consent be, how often should it be established, and what constitutes [diminished capacity] (usually due to drugs or alcohol) are all subjects of some disagreement. These debates take place both on moral] and ethical] grounds, and as a legal issue, since rape can only be convicted as a crime with intent in many jurisdictions, and the erroneous belief of consent is a common defense.