First off, the Britney photo is air brushed. Britney looks great in this picture though. Her hair & make up look fabulous. And although I think they could've done it a little more tasteful (I mean, you can
see everything but her nipples and bikini line) all in all it's not a "bad" picture. I can only hope that I look as great as she does when I am pregnant. And I guess the real issue is, would it be ok for you or I to sit in the middle of times square naked, with my legs crossed and covering my nipples? Nope. They'd toss me in jail in a second. And although this is a magazine, it's in every store you go to, staring people and children in the face at the check out lines. It doesn't really bother me
per say, but I can see how others who are more modest would feel. I was raised that the nude body is indeed beautiful, but that modesty was important, and that your nudity be shared and appreciated by "the one", ideally my husband.
Are we putting nude pics of men on the cover in the check out aisle for all the kids & all the world to see with a hand covering up their man parts? Nope.
Another important factor in all this is how you grow up. If you have brothers, you are more likely to know about girl parts & boy parts, but I have 3 sisters, so I never had the experience as a child to know what boy parts look like. My father was always covered up, or in his boxers at a minimum. My mother as well, I mean we saw her in her underwear, but not nude. It was never made to be a big deal, if we happened to walk in on someone nude, but we were told to respect peoples privacy by knocking... they are called private parts for a reason. I have recently noticed through friends of our daughter, that a 7yo little girl will strip out of a wet bathing suit in front of her 10 year old brothers, and while this is not a very big deal, I do not want my 8yo undressing in front of her friends 10 yo brothers. So I think your upbringing has a big part in how you feel about this topic.
Aside from all of this, I feel bad for the kids... the ones who have to grow up and see a picture of their mom naked. Regardless of whether or not she was pregnant. That is something that no one wants to see.