That word, it doesn't mean the same things in certain countries
In the US, there's "statutory rape" which strangely covers consensual sex where one of the participants is under the age of consent. So there's a devalued use of the word. In Mexico, we call that "estupro" and thus the actual concept of rape isn't devalued.
And yes, up until recently, in most countries there was no such thing as marital rape. Interestingly, while laws have been fixed on these cases, female-on-male and female-on-female rapes are rarely prosecuted (or even considered as crimes); males trying to press rape charges on females will usually be laughed out of the police station. Sad but true.