Rolf: Perhaps they've [...] given the females a perfect defense

I think you're trying too hard to make it "acceptable". It's common currency in transhumanist circles that - even if all goes well - the future will almost certainly contain some things that we would find shocking. But your suggestion would mean it's not really shocking.

What I'm taking from it is that, in this imaginary future society, there is non-consensual sex that - for one reason or another - is not unpleasant.