In the animal kingdom, a Lion with a big thick mane is sexy, and a big thick mane is a sign of a well fed lion. Male Lions will even shed their mane if they loose to a new alpha male. So poor health or malnutrition could cause "ugliness" in other animals.
No. I grew up on bread and water (I was for sure deficient in vitamind D and calcium) I was a very picky eater who did not eat any of the boiled chicken my parents offered, didn't drink milk, etc... Anyways today a homosexual man at work out of the blue said I was a "8 or higher on a 1-10 scale".