Cartoon nudity?

I was just watching the new episode of Family Guy, and in the episode, there was a scene where Lois and Peter had just finished smoking marijuana and were lying half naked on the couch. Upon watching this, I thought to myself, would this be considered obscene or indecent material? I believe this would probably be more indecent material than obscene, but just watching it made me think of how often cartoons show and displays indecent material. There are plenty of episodes in Family Guy where the main characters are nude, but is it proper to be showing that on television? Personally, I have no problems with it, I mean after all it’s only a cartoon, but what if a little child were watching these episodes? Sure, they’d probably find it really funny, but if you take a closer look, should we be exposing these kinds of materials to children at such an early age? Granted, there are a couple of episodes where they warn “viewer discretion is advised”, but how often do parent’s actually shut off the television when there children are watching cartoons? Maybe I’m thinking too deep into this, I mean how can cartoons harm anyone right? Also, I would like to point out I have nothing against Family Guy. I have all there seasons on DVD, and I love that show to death.