Durer was obsessed with the perfect form and proportions of human body. They stand in practically identical positions. Their weight is on one leg, with the other slightly bent. The right arm of each is bent and sloping slightly upward. The four animals represent the four temperaments according to the Medievals. These bodies are proportionally accurate and very realistic, although not as pleasing to the eye as Roman marble sculptures can be.
Personally, I think that Eve's face is not attractive at all. She looks a little bit like George Washington.