Fairly, dear, it's very very simple. Even for you to understand, steeped as you are in deplorable rape myths.
If you're not 100% sure that the person you're about to penetrate is 100% capable of giving consent, and is 100% giving consent, don't stick your penis into her.
That way, no one gets accused of anything, and, far more importantly, no women are raped.
See how lovely the world can be when you're not stupid enough to believe what MRE twatbadgers tell you about rape? There. A calming cup of tea might be in order now, yes?