In 1972 John Berger said that women are forced to carry an image of themselves in their heads. They regard themselves as being looked at so maybe make more of an effort and put themselves out there.
This image is called Vanity and it is by Hans Menling.
It seems as though we are given permission to look at this womans body because she is looking at herself in a mirror. This breaks eye contact with the audience.
Another example of this is Alexandre Cabanels birth of venus.
In this image, her arm is over a lot of her face.
Again, this means she isn't looking back which means we aren't being challenged and she is giving us permission to look at her body.
This is the same kind of image but with photography. It was used as an for YSL's Opium advertisement in the 90's. The nature of this photo was considered far too sexualised to be out for the general public to see. Partly the hand on the breast which actually covers her modesty and partly because the attention is drawn to her body.
In the below images (left: Titans venus of vurbino-1538, right: Monet-Olympia 1863) they are quite similar in composition. However there are subtle differences. On the left the woman is very relaxed with a soft look of her face whereas the right is more rigid, also pay attention to the hand positioning. The left is just draped over herself whereas the right is more definitely placed as if she does not want that part of her body on display. Both images are like you have special access to their bed chambers but one is more inviting than the other.
The next images (Ingres Le grand odalisque 1814 and the edited version for a poster for the Guemilla Girls) They used this image to put on their poster advertising that less than 5% of the artists in the modern art section were women but 85% of the nudes are female. Basically, they're asking why women are mostly the ones being sexualised?
However, this poster was seen as being too sexually suggestive with the fan in her hand so it got pulled.
This is Coward.R the look from 1984. In this image there is a barely dressed woman in the city streets and everyone around her is just going about their daily business as if she wasn't there. This shows the normalisation of nudity. In this image the camera is an extension of the male gaze.
This image of Eva Herzigova was on a billboard and ended up stopping traffic because people were slowing down to look at it. That shows that sex sells because people want to look at it.
This advertisement for Dolce and Gabbanas male underwear line still had nudity in the ad but the way the models are all looking directly at the camera is challenging the viewer so it makes it not as okay to look and you pay more attention to their faces because they're connecting with you.
Images such as this which is a celebrity caught unaware by Cindy Sherman are liked because everyone wants an insight into a celebrities life and want to see more of them. The sunglasses here are used much like the mirror at the beginning of the post and the arm over the face. It's to distance the gaze from the viewer to make it okay to look at her.
An example of people wanting to see more from celebrities is big brother. people just sit there and watch other people. But the women on the show are very aware they are being watched and almost perform to it like they are very aware of how they look.
Your gaze hits the side of my face by Barbra Cruger has like a double meaning. Its like yes you look at the side of her face but also the word 'hits' could mean like you literally hit the side of her face like this whole thing with the media and portrayal of women is damaging her. 
Tracey Emin challenges this kind of portrayal of women with this photo showing that money is more important-thats what people want, thats what they see in this photo. Not the fact its between her legs. Another way you can look at the photo is that a womans body makes money.
