Why so fascinated with rape SA?

There are of course some differences.  The law is some countries recognize some differences--statutory rape (consensual sex but with a minor) for example.

However, I cannot fathom a situation in which the assailant's behavior can EVER be excused (even on percent) due to the actions of the victim.  For example, I don't care if she shows up naked on your doorstep.  If she declines to have sex and  she is forced, it is rape just as if someone had attacked a full clothed woman at a shopping mall.