Despite a wide range for standards in beauty and sex appeal, there are however a few widely shared preferences. It is to a males’ genetic advantage to fall in love with a women who will produce viable offspring; as it is to a woman’s biological advantage to become captivated by a man who can help support her young. The appearance of health also plays a part in physical attraction. Men and women around the world are attracted to those with good complexions. Everywhere people are drawn to partners whom they regard as clean. Often, women with long hair are thought to appear more beautiful, as the ability to grow long, healthy looking hair is an indication of continuous health of an individual. Hair is a visible record of not only a woman’s health, but her history, too. It takes about 3 years to grow shoulder-length hair, and since it’s not essential to survival, it suffers if the individual becomes very sick. Hair reveals our diet, our habits, and our aesthetic choices. Another indication of health of an individual is the ability to grow long, strong, healthy-looking fingernails. The preference for this effect has resulted in the fact that artificial nails and manicures have grown extensively popular for women beginning in the 20th century. Healthy-looking skin is also considered a beauty trait. Other signals of human female reproductive capacity are big breasts accompanied with a small waistline that accentuates her hips; this demonstrates to the prospective male that she can carry a child. Researchers have found that women with the classic hourglass shape are twice as likely to become pregnant as women with other shapes. And to top it all off, women use clothing to accentuate these aesthetically pleasing features.