User blog comment:PlantyThePottedPlant/Random Topic Blogging II: Electric Blogaloo/@comment-4121682-20120817014823/@comment-4121682-20120817231041

That's because he has thin arms to begin with....it's in the animation style. Here, he's 15; think about Candace being 16-17-ish and still having scrawny arms.

I reiterate, it's the animation style unless you're meatier or outright fat. XD