People who drank more coffee had less body fat, less visceral fat, and more lean mass than less-frequent or non-drinkers.

The biggest benefit was seen at 5 or more cups per day.

And for men, every extra cup per day was associated with a ~10 ng/dL higher total testosterone. Higher coffee intake was also associated with better glucose and insulin regulation in men.

This was an observational study, but mechanistic and experimental evidence actually supports coffee's benefits on metabolic and hormonal health. I'm willing to believe there's a real link here rather than draw a conclusion such as "coffee drinkers live healthier lives in general."