It won't work. Just hiding some part of the body (not necessarily the chest) is not enough - you also need to a) somehow associate this part of the body with sex (which you can probably somehow do) and b) provide more or less constant sexual tension. In men, sexual tension causes excess testosterone in the body. And women have much less testosterone, so it is difficult to ensure condition b). And without tension, there will be no excitement at the sight of the breast or any other part of the body.
Women's breasts excite both men and women, not because they are hidden, but because, first of all, they are a symbol of the satisfaction of desire. All people have the image of the mother's breast as a tool with which the child feels almighty. Since the image of a man's breast does not carry this semantic load, it a priori cannot be as desirable.
I would not say so harshly that the ability to excite in certain parts of the body is associated precisely with their closeness. The embedded biologically erogenous zones became objects of excitement in the opposite sex long before a person even began to wear clothes. On the other hand, take a look at other animals that have certain external signs that can attract the attention of the opposite sex - for hundreds and thousands of years they still remain in demand and evolutionarily fixed, which tells us about completely different reasons for their popularity. As for a person, the closeness of some parts of the body definitely adds some piquancy and mystery to them, but this is not at all a key factor. After all, most people are still turned on by pornography, although the porn actors on the screen are clearly far from being closed.