"Is there a rape switch?" is the wrong question.

Go check out abyss2hope's post about the idea of a rape switch:

Some people will flat-out say that all men are animals who cannot control their sexual behavior once they are sufficiently sexually aroused. This puts girls and women in control of boys and men's rape switches. The only prevention under this model is for girls and women to never do anything which could sexually arouse a boy or man, thereby flipping his rape switch, unless that girl or woman is willing to accept that boy or man's mindless sexual aggression.

This is a handy way of thinking for boys and men who don't want to be held responsible for their own actions because they will only rape under specific circumstances. This can also give girls and women a false sense of safety since their choice to leave what are labeled as boys and men's rape switches in the off-position actually controls nothing.