Why do cartoons and other American shows never change openings?

[Kasz216]

Soriku said:
Hey I like casual shows too. But they aren't the best. Shows like that don't need openings (many don't even have them).

Also whenever I see stuff like cartoons and kids shows and such around I never see an opening change. Of course some of you guys haven't seen what I'm talking about and seen other shows that I haven't...but I find that Japanese shows change their openings way more often. I think zexen makes a good point though about the singles thing.

That's totally the problem WITH Japanese shows though Soriku.

9 times out of 10, the original theme kicks ass... then the theme they replace it with is just ok.