One Piece Episode 588

[DarthEnderX]

Switching hearts to switch personae is only metaphoric.

Oh. Alright then.

It's rather interesting he can switch personalities at all between bodies. In physical terms that would require switching brains, which would be quite a feat, especially between men and women who even have different average brain volumes, and in One Piece the head volumes are regularly vastly varying.

Ah, see now, science aside that's still how they should have done it.