Not so sleeping beauty

Fat girls were considered beautiful when most people were poor so that meant they had the money to feed themselves well. Even then they wore corsets to make their waists smaller so their hips would look wider which was better for child bearing. And when people made themselves look whiter it was to make it seem as though they never had to go outside and again they were that rich.

Sometimes being overweight is a medication symptom. Sometimes it's genetic. You aren't their doctor and don't know their health issues so don't say that they can prevent it or it isn't attractive to be unhealthy when you don't know what's going on. You wouldn't say the same to someone with cancer or to who was on their death bed would you ? Probably not.