women and advertisements

As it is shown in those pictures the women are exposing their bodies in order to promote the products that the customers would like to buy. Different companies are using the women's images in order to sell their products and having benefits from them. So different companies have decided to make advertisements more attractive or to sound much more interesting to the customers by using women’s bodies, without showing interest in the way they represent women. They represent them as a sexual object only to attract people, especially men. There are lots of ways to promote a product. Why do we have to use women’s bodies in advertisements?