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While it's very rare to find someone who really, truly doesn't like fatty foods (the preference evolved to help our ancestors survived in leaner, pre-vending machine times), scientists have found that certain forms of the fat-loving gene make some people go crazy for the stuff. In a study recently published in the journal Obesity, food and nutrition researchers explain that those with a variation of the CD36 gene (that's about 21 percent of the population) tended to rate salad dressings as creamier, half-and-half as tastier, and cooking oil as more appealing. The study results may help explain why some people have a harder time sticking to a low-fat diet than to a low-carb diet, one of the researchers told Science Daily.

We like that it gives butter-lovers a bit of a break (it's not my willpower--it's my genes!) without suggesting that they completely throw in the towel on diets and healthy eating.