The topic of fanservice was brought up in the most recent SBS Volume 105 where a fan asked why there are little to no panty shots.
This question is meant seriously. One Piece often features shots where women show their chests, but it hardly ever has any underskirt panty shot. Is there some reason or policy you have for why that is the case?
This is Oda’s answer:
Nah… it’s just something I’m not interested in myself lol. Ever since I was a child, there’s been many manga that feature fanservice scenes, but most of the time it’s done against the consent or will of the female characters… so I feel that having females show their sexuality out of their own volition such as like with “happiness punch” is a much needed revolution for the representation of heroines in manga.
Src: opfanpage.com