Men are naturally more muscular (lean) than women, and require more calories to maintain their weight. This is because muscle is a metabolically active tissue and our bodies have to burn calories just to sustain it.
Men also generally have larger frames than women, and it is often said that they can "carry their weight." But while society may find being overweight more acceptable for men than women, it is certainly not more healthy. This is largely because of where body fat is distributed on men. Studies show that body fat distributed on the waist and abdomen is the most detrimental to your health.
Men tend to store fat on the waist and abdomen, giving obese men an apple-like shape to their bodies. Fat that surrounds the abdominal organs (visceral fat) is far more dangerous in terms of increasing the risk of obesity related disease than fat distributed on the lower body.
Women tend to store fat on the lower body on their hips, thighs and buttocks, giving obese women a pear-like shape to their bodies. Women also tend to store fat closer to the surface of their skin (subcutaneous fat) than men do, increasing their tendency to form cellulite.
Of course we don't need to tell you that women can store fat on their waist and abdomen, too. Or that men can store fat on their hips, thighs and buttocks.