I would expect nothing more out of a comment of your's. This body is FIT, jesse. You don't get tone like that from starving yourself. But, fine. I know a million women who would rather look disgusting, then.
First of all, look at the way the fur and the her left arm are held against her. That's creating an illusion of more curves. There aren't many girls whose bodies are a straight line. There aren't many girls who have no breasts, no hips. Every guy has some muscle, that's like me saying about a scrawny guy "THESE are muscles."