hah! Finally watched it with Audio
Here's my take:
American entertainment companies still view cartoons as something aimed at children. Although we have South Park, et. al., (and earlier, we had Heavy Metal) more adult flavor shows are a nitch market.
Of course risque humor does not offend the Japanese, however even the fact that a girl "of age" wearing a skirt in a video game, has the graphics edited so that she's wearing shorts underneath, just incase you get a panty shot (I'm talking about Hot Shots Golf: Out of Bounds) is required because the US has such a stigmata against it (but blowing someones head off with a head shot in Halo is perfectly acceptable). I get the argument that it can be demeaning to women, but explain that to poor Keitaro Urashima as Naru hives him another what-for. Girls get panty shots, guys look like fools and get used as a punching bag. There's some give and take there. LOL
I don't suggest showing say Rosario Vampire after Bambi to the kids (although Bambi isn't exactly "safe" really), age appropriateness is key. But unfortunately its a nitch market here in the US, although it is larger than before, but its still nitch.