There is some talk of defining human beauty here.
It is generally in the eyes of the beholder, a preference developed for various reasons, but some of those reasons are a part of a big ugly to me. This is much like defining good and bad in many instances. For example, one man's ideals might glorify war, and another might define it as man at its ugliest.
So we are talking bodies and parts. Ugly, defines as abhorrent, distaste, a sense or feeling that one gets. It may be better to not define a human form as ugly, or beautiful, but rather, that it is what it is.
Attractive, or unattractive, that is something that naturally happens, a drive toward a stimulus. That can be valid as feelings, but it is personal preference.
Studies have shown that the world over popular ideals of attractive are a certain set of proportions of measurements for women, no matter what the weight and height, and square balanced features for men. It's a sexual attraction thing. Sexual attraction is always clouded over with emotions, comfort what one is used to, and all of the other attributes that humans display and possess. Even situations can flavor that attraction.
After being raised on Playboy magazine, just healthy is now attractive to me and any style human is okay. I used to like smaller women for sex, not looks but for function. Just someone growing on me happens, for example, these days DF is the most attractive woman in the universe. That's just me, now.
So, "all bodies are beautiful." I don't know that I would say that, but all bodies are okay. I wouldn't judge a body to be ugly, but personally less attractive than the others. All bodies deserve to not be judged to be placed on a hierarchy. We are more and bodies are what they are.
Hanging out naked with all shapes and sizes, I notice that that notion of ideal bodies and ugly naturally fall out of the window to a significant extent. We are people, we are socially adept and can be fun to have around. Sexuality is less of a tool in socially nude situations.
Healthy looking is attractive and sexy for me. Invigorated people rub off on me. My peers, when healthy, will be more likely to aspire to what goals and activities that I have for myself and inspiring me to be more what I would like to be. Healthy looking can also be housing a dumbass jerk, or a bore, intellectually some place else, which are all unattractive. What do I want from the people around me, varies, but labeling them ugly, or beautiful, judging and classifying people to the point of not being open, is going to generally work against my self interests.
Bodies are what they are, very entertaining.
Jbee