By the definition of the word "rape."
RAPE:
1: an act or instance of robbing or despoiling or carrying away a person by force
2: unlawful sexual activity and usually sexual intercourse carried out forcibly or under threat of injury against the will usually of a female or with a person who is beneath a certain age or incapable of valid consent — compare
sexual assault,
statutory rape
3: an outrageous violation
http://www.merriam-webster.com/dictionary/rape
rape:
noun
1.
unlawful sexual intercourse or any other sexual penetration of thevagina, anus, or mouth of another person, with or without force, by asex organ, other body part, or foreign object, without the consent ofthe victim.
2.
statutory rape.
3.an act of plunder, violent seizure, or abuse; despoliation; violation:
the rape of the countryside.
4.Archaic. the act of seizing and carrying off by force.
verb (used with object), raped, raping.
5.to commit the crime of rape on (a person).
6.to plunder (a place); despoil:
The logging operation raped a wide tract of forest without regard forthe environmental impact of their harvesting practices.
7.to seize, take, or carry off by force.
http://dictionary.reference.com/browse/rape
That is, what about the definition of rape makes it inherently violent?
What is
not violent about rape?