Politicians who are legitimately stupid rarely get elected.

[DanaC]

I would imagine that the closer society moves towards a right-wing christian ideal, the more 'illegitimate' rapes there will be. As the social consequences for the woman of extra-marital or pre-marital sex increase there would be a greater need to explain it away by designating it as non-consensual.

This may well mean that in stricter families and communities there is a greater risk of consensual sex being classified as non-consensual. Which could then feed back into that family and community and form a greater suspicion of women's claims of rape.