Women, more junk in the trunk could mean more fuel in the tank. For a change, a new study has some good news for those sporting a plumper rump. Researchers from Harvard Medical School discovered that hip and booty fat might just protect women against type 2 diabetes. They found that when they took buttocks and hip fat from mice and injected it into other mice, their bodies used the blood regulator insulin and lost weight. In other words, butt fat made it easier for them to use of insulin, which is the main hormone linked to diabetes. “People with the apple shape, where fat is stored around the tummy, can be more prone to type 2 diabetes and heart disease,” FOXNews.com reports. “Those with pear-shaped bodies, where fat is collected in the buttocks, are less likely to have these disorders.” Researcher Dr. Ronald Kahn contends that not all fat is unhealthy. “The surprising thing was that it wasn’t where the fat was located, it was the kind of fat that was the most important variable,” he said. “Even more surprising, it wasn’t that abdominal fat was exerting negative effects, but that subcutaneous fat was producing a good effect. I think it’s an important result because not only does it say that not all fat is bad, but I think it points to a special aspect of fat where we need to do more research.”