Sorry bro, but that's her own fault. Rape is not a choice, but birth control is. Choosing not to be on birth control implicitly means choosing pregnancy.
Lots of other things are like that. Welding without a mask even when they are readily available implies that you don't care if you go blind. Driving without a seatbelt means you don't care if you live or die. Not being on birth control tells the world you're willing to accept the consequences of being raped. It's not like rape is a rare thing. Women know how incredibly common it is. It's very likely that you know several people who have been raped. I'm not even 30 and I know at least 3 women who have admitted it. It's as common as crashing a car, and we wear seatbelts because we know how common that is.
WTF ? Women should take birth control in anticipation of being raped ?