British and German scientists have studied it together (including psychologists and biologists). Experiments show that male and female animals living together, such as cats or dogs, live longer than other animals living alone. This is the reason why opposites attract in nature. As an advanced animal, people are conscious and thoughtful, so they have the ability to distinguish, so they can draw a clear line between beauty and ugliness from the public's point of view. Some beautiful things will make people feel comfortable, so for men, every day is. Especially the handsome guy you like: