
What he meant by "legitimate rape" is, I think, what sane people might call aggravated rape. So, I think, "legitimate rape" is supposed to mean non-consensual sex with violence, as opposed to non-consensual sex without it - say, if it's only threatened, or if it's sex during sleep, or something like that. (See the penultimate paragraph here.)
( , Mon 20 Aug 2012, 12:02, Reply)

The phrase they are using there is "assault rape". As opposed to "statutory rape" such as sex with a minor, which is called rape even when it's consensual.
( , Mon 20 Aug 2012, 12:15, Reply)