Hi, The Question I Wanted To Ask Is Why Do

Hi, the question i wanted to ask is why do women orgasm during rape? I have come to know that statistics prove that it is common for women to orgasm during rape. I understand that they are most likely to feel aroused during rape since the vagina lubricates to prevent injuries but then why do they orgasm?
Getting a women to orgasm during normal sex is not considered to be an easy thing so then why does a women orgasm during rape when in fact that main goal of the rapist is to please themselves?
I may be wrong on this but i also read that for a women to orgasm she has to concentrate on it a bit, meaning there has to be some sort of intention to orgasm.