Would you welcome him posting a thread, "My brother's been assessing my pubic hair and making comments about it, is he weird or what? I have his interests at heart, I don't want people to think he's crazy or a little bit strange commenting on the state of my bush, but it was like really odd for someone to mention it in the first place don't you think?"

Mind you beeswax. When he or anyone needs your pubic advice I am sure they'll ask you for it