Sexualizing breasts and why it's ridiculous

Sa
What if, for some reason, we all start teaching our young sons and daughters that a woman's nose is a sexual object? What if our young men grow up taught to be aroused by the center of a woman's face?
The nose does absolutely nothing sexual. It is only used for smelling and for breathing. But if we teach the people that the nose is sexual, it becomes sexual.
If the female nose were to become sexual, would we then require all females to somehow cover their noses for the sake of modesty? 
Would that not be ridiculous?
Now, come back to real life.
Breasts do absolutely nothing sexual. They are composed of fatty tissue and they're used to feed babies. 
But we've all been taught that breasts are sexual, so we've required all females to cover them up for the sake of modesty. 
What would happen if we stop teaching kids that breasts are sexual? What if we treated breasts like every other part of the body? Useful, necessary, but not sexual; just like the nose.