Ranai wrote:
Arousal is arousal, not consent. The fallacy ‘If it's turning you on, you want it’ is used ad nauseam by writers who invent a nonconsensual situation and at the same time feel compelled to deny it.

The epitome of this absurdity, if used in writing about a rape situation, is the phrase ‘His body betrayed him’ or ‘Her body betrayed her’.
First of all, I'm glad it's been brought up that an orgasm doesn't imply consent. I'm in hearty agreement with that fact- enough that I feel justified about posting when that's the only thing of merit/on topic I have to say.

As an aside, I always heard the phrase 'Her body betrayed her' not to imply that it revealed what she really wanted, but that she found her body's reactions to be a betrayal of how she was feeling... She's afraid, humiliated, in pain, and her body is betraying her by reacting in a positive manner despite all that.

That's not to say that either interpretation is more valid, of course. I'm just offering another viewpoint to the way that phrase may be used.