As the Savanna Principle (“the human brain has difficulty comprehending and dealing with entities and situations that did not exist in the ancestral environment”) suggests, men’s brains cannot really comprehend silicone breasts or blonde hair dye, because these things did not exist in the ancestral environment 10,000 years ago.  Men can cognitively and consciously understand that many blonde women with firm large breasts are not actually 15 years old, but they still find them attractive because their evolved psychological mechanisms are fooled by the modern inventions that did not exist in the ancestral environment.