I wouldn't want to have kids see Titanic, but not because Jack paints Rose in the nude, or because the two of them steam up the window of that 1912 Renault. I'm more concerned about the passengers falling long distances and injuring themselves as the ship tips toward the vertical, the scenes of blue corpses floating in the water, and above all the scenes of kids being separated from their fathers as they're put into lifeboats,
Yes, it's pretty traumatic movie for kids. I was surprised it went as low as PG13 (US) and 12 (UK).
Now, apart from the number of exposed nipples, the Superbowl incident is very different.
Janet Jackson, or Janet Jackson's "character" if you like, voluntarily chooses to stick around while Justin Timberlake's "character" is getting all worked up and singing rather aggressively about his intention to "have you naked by the end of this song." At the end, and apparently without her permission, he rips off a piece of her costume.
My girlfriend, who saw it live, made the same point, so I think the suggestion that there was more than a hint of sexual aggression to it. I didn't see the show, only a still from the show, and honestly it looked incredibly tame, compared to the videos kids watch on TV day-in, day-out. Really I'm much more worried by the portrayal of men as pimps, drug-dealers and abusers or women than the suggestion that Justin might get so worked up over the obviously complaisant Ms Jackson that he rips off her top.