Humans are sexual beings if we weren't we wouldn't be here.
Men like looking at the women in the Sun, a large number of MNers have enjoyed a semi naked video of David Beckham.
I certainly enjoyed a certain episode of Merlin with rather a lot of topless knights.
I don't imagine my DDs have seen the Sun unless they've seen it at school, but I doubt they'd bat an eyelid.
DD2 certainly wouldn't, she is an expert on breasts (see extended BFing threads).
I know banning page three is about something far deeper and more complex than nudity not being perfectly natural and healthy, but that is not how 90% of the population will see it.
Now, if someone wants to start a petition against the vile sexist crap in the Daily fail, OK etc about wow unheard of actress has gained a oz or lost her baby weight without going to the gym, accompanied by a pile of soft porn bikini shots, I will be delighted to sign it.
As the mother of a somewhat fashion conscious and very strong willed, DD2 all the focussing on body image and weight by women for women frightens me.
A pair of breasts that a 10yo could work out aren't natural does not.