Uh, with no offense, are you religious? I ask because the reason nudity is considered indecent in the US is silliness in the bibble - a pseudohistorical book of the xtian faith - first chapter IIRC.
No, I'm not religious. By the way, yours is a rather common argument technique among liberals and progressives: "if you disagree with me about X, you must be supersititous and uneducated". (The conservative version is "if you disagree with me about Y, you must be a traitor and a communist"). Both are nonsense.
Nudity is not universally considered indecent.
(Shrug) Slavery, incest, rape, killing babies, and head-hunting aren't universally considered indecent, either. If you only disapprove of behavior that is universally considered indecent, you will disapprove of no behavior whatever.
And certainly not so by me.
Are you telling me you would not care if someone showed your children pornography without your knowledge or consent? It's only nudity and sex, two things that are not considered universally indecent, are they?
Of course you would care, and quite rightly, too.
As in the superbowl case, too, the problem is not the nudity or sex in themselves, but how and when they where shown and to whom.