Only if the one to be raped is one of the following:
1) is a whore (a slut lacking dignity or integrity who according to studies doesn't suffer from being raped more than a few weeks)
2) is not a heterosexual man (because men are not made to be raped) (This point needs to be paired with another point to allow rape.)
3) is the same race as the raper (because we don't want cro-magnons raping all our women)
4) deserves to be raped (For instance the rape could be just punishment for filing false rape charges against an ex, in which case she should be raped more than once.)
5) provokes rape (through willfully making advances just for the sake of getting what she wants or hurting the raper through rejection)
6) is a feminist (because those fucking retards needs to be put in their place - it's either rape or burning them at the fucking stake)