I don't support Sanji getting with Pudding when she's 16 or any One Piece character that's into 16 or 17 year olds and I think it's unnecessary that they're chosen to be this young but I guess it has to do with other country's age of consent laws and stuff. Regardless, I don't think it's a good look for Sanji or any other character that's into or has hooked up with someone younger than 18. Is it pedophilia? Not really but it's wrong, in my opinion, nonetheless, given that most at that age are still inexperienced and vulnerable. Given different countries have different ages of consent, it's bound to lead to arguments given in x country, this is the norm whereas in y it isn't but I'm against it personally.