Why do men like women's butt?

What is far view, fantasy, stroking and squeezing, what will attract the attention of many men to the woman's sexy hip?
The theory has long believed that women's hourglass shape, including the whole lower body, is very attractive. Because it shows the health and fertility of women to some extent.
We know that the buttocks can reflect the unique feminine taste of women. After puberty, sex hormones begin to affect the distribution of fat in the body. For men, fat is more likely to accumulate in the visceral weeks. In women, fat is more in the hips and thighs.
But this does not mean that men all over the world will be dumped for their fat hips. In general, weight is also an important indicator, but different cultures can also cause different views. For example, a study pointed out that in the UK, Spain, Portugal, men prefer slim girl, and Latino men on the waist buttocks more interested. Another study found that breast milk is more attractive than fat.