Some people are naturally thin and some people are naturally heavier. It doesn't mean that bigger is healthier, or much thinner is healthier, it's on an individual basis.
I think that some books are more successful than others to certain readers. People who read my books for the humor, they're going to love one book. People who read my books for the mystery, they might not like that book quite as much.
If God had to give a woman wrinkles, He might at least have put them on the soles of her feet.