After the body switching in PH, there is a scene of Sanji grabbing Namis boobs and shouting with glee in front of the crew-including Nami. This nets him applause from Usopp and Brook, and the only repercussions from Nami is that she writes down rates for groping/ogling her body.
No, Oda isn't writing the story with signs saying "Sanji is admirable and is living the dream".
But when such a scene can occur, and not result in Sanji and Namis relationship being destroyed for the unforeseeable future…Sanjis behavior may not be presented as thoughly positive, but the absence of any negativity in response to his behavior is also an issue. In another context, Sanjis traits could be used for either an antagonist or a total pathetic creep character.
Don't know about you, but if I found myself in a body with tits, I know what I'd do.
After all, the woman who's presumably in my body has the same opportunity right in front of her.