Evolution and natural selection evolved us with brains wired in such a way that we don't want to get raped. Which is why we say rape is immoral and have laws against it. And unless one claims that it was our subjective judgment that made evolution and natural selection produce organisms that don't want to get raped rape is objectively wrong.
But some people do wish to get raped, fantasize about it.
I think we could make blanket judgments about what people apparently want/don't want, play the 'natural selection' card, call it 'objective' and have a field day. I would expect that to be challenged left and right. Like killing is a great example. Doubt anyone wishes to be killed, even if it means self defense for another, so therefore it would always be objectively wrong to kill a person regardless of the circumstances. Oh, and pay no attention to the people who seemingly desire suicide as that is different than being killed by another person, well in most cases.