I suppose I could repeat what I said about necessary and sufficient conditions, or once again recommend that you read the original article where I discussed sliding scales for the age of consent, in which menarche was just one factor. But that would presume that you're interested in listening seriously and thinking this through, rather than in having a morally satisfying fight with your imaginary misogynist adversary. Some people just want a fight, and there isn't much that can be done to stop them.