Legally: no. But come on, it's just common sense, if you're attracted to the body of someone with the body of a 10 year old, then you're attracted to the body of a 10 year old.
ON Game of Thrones: see my previous post. Nudity=/=porn, and porn=/=nudity. They are separate scales, and you can in fact have sex explicitly shone without it being necessarily porn. Here's a good example: I was given a show called Angel Something or Something Angel or whatever. It was season 1 of an anime about three girls who drive mechs. Can't really remember the plot, partially because there wasn't really a plot so much as a "use this as an excuse to show these girls blowing stuff up, shooting things, or being sexy". For the most part, it was just generic episodes, bland and uninteresting. So then came the obligatory swimsuit episode. Tell me if this sounds familiar: bunch of girls get invited VIP to a pool party, they wear sexy, ridiculous clothes (one wears a skimpier Faye Valentine copycat outfit normally, and wore something even more ridiculous in the swimsuit), and that's when I stopped watching the series. Basically, they took a typical, no wait, stereotypical porn premise and made a "non-porn" TV episode based around it. That episode was porn, pure and simple, despite the lack of true nudity (does a swimsuit that looks like body paint count as nudity?). The others before that? No, not porn, just bad. The ages of the various girls? I can't remember, but one was somewhere around 8 or something. Was she sexualized in the swimsuit episode? Yup. The flat chested troubled teen? Yup. The busty older teen? Absofreakinglutely. The somehow even bustier middle aged (re: probably around 20) woman? Less so than the busty teen (probably around 16 or something). Was this show categorized as porn? Or course not, there's no nudity. Is it porn? You better believe it, the only possible reason I can think of for that entire episode was sexual arousal. Not just fanservice, but porn.
EDIT: Actually, legally it might be in the US. I think I remember a case where a guy was arrested for possession of child pornography when the porn in question involved no actual kids, but lolicon hentai, the "stars" of which may or may not have been underage, but certainly looked way too young.