I don't know if I'm a "true caundalist"; although I've been called one.
For me it's pretty simple. Even though we've been doing it for a while now, I still get sometimes amazed by my wife's willingness to be completely naked around other people at nudist venues. At this point, I don't "show her"; she "shows herself." I'm not so concerned about what other people think when they see her naked; I'm more in "admiration" of her not caring about it. Especially when interacting/socializing with people who can see her naked "up close." Her confidence makes me proud.