Men and women are fundamentally different when it comes to losing weight. That's the reason why the men weight loss methods are different than that of women in that they need to allow bigger intake to sustain the more massive nature of men.

Perhaps the most striking feature of this comparison is the fact that although the total metabolism, as measured by the carbon dioxide production and oxygen absorption, is greater with men than with women, the body weight is also considerably greater and likewise the height" - Taken from "A Comparison of the basal metabolism of normal men and women" by F.G. Benedict and L. E. Emmes.

That's the fundamental difference between the two genders. Overall, men are bigger, sturdier and have a faster metabolism (meaning that they need more supplies). This is a key aspect that makes a diet worth its money. A good diet developed and tested properly by certified scientists and nutritionists is bound to be custom tailored for each gender, with the men weight loss method having substantially bigger numbers to cope with the higher needs of the men body.

Eating too much is certainly a problem. However eating too little may end up being just as bad or even worse. If you don't eat enough to keep your body going you can experience loss of focus, dizziness, loss of strength and more advanced health problems such as gastritis and stomach ulcer. Remember, your body is science, so when intervening in it's chemical processes you need to make sure you know what you're doing.