We are talking about culture here. And the fact that cultural behavior are not necessarally good or bad, they are just product of the society.
Women bath with children in Asian country and native south american country, will you tell those culture that they are wrong because you believe in the sacrality of nudity ?
You see, I figured the problem very early here. The problem is not One Piece, its your vision of cultures. While there are indeed borderline choice of sexualization by Oda (for Carrot or Bonney for ex), the majority of what you are angry against are simple culture differences and most of the things are not even questionnable to begin with.
See.. you are seeing the world through your belief system and not how it really is. That's why you think leftism is a disease.