Hermann Cain has a penchant for inappropriate behavior, which is now coming back to bite him. His political rivals likely researched him and helped to bring the accusations out, but he is actually guilty of most or all of what they say he did.
Hermann Cain has never sexually harassed anyone, but his political rivals found numerous women from his past who have an axe to grind and are therefore willing to make false accusations against him.
Hermann Cain is guilty of minor sexual jabs that could be seen as inappropriate, but that would be overlooked in most workplaces. However, his political rivals have greatly exaggerated them in an attempt to bring him down.
I'm not being sarcastic with any of these possibilities. Vote for which one you think is most likely true.