All creatures, including humans, possess instinctual knowledge. This is stuff we are born with. For instance: fear of snakes, or estinating how much protein is in our food by taste. Some of our instinctual knowledge is about mate selection since procreation is a very important goal for a species. We use our nose to detect if others are a good immune system match, and we use our eyes to see if they are sick or unhealthy and also assess their ability to nurture children. That last part is where the boobs come in. They make breast milk and so they are a feature that gives pleasure to see. There is no choice about it. We like what we like because of our genetic programming.
Lookup “phased array” and “beam forming”