That's part of it. The chart that /u/BeetusBringsBoys linked shows it's a fairly even split between male and female (females edge out a hair, but I don't know the margin of error on this study).  My personal anecdotal evidence is that I see more overweight men* but more deathfat women*. That leads me to believe that men have more tendency to let themselves go, but when a woman lets herself go she goes all the damned way. *Note: The use of the words Men and Women in this post is referring to the gender identity they had prior to becoming lardasses. They forfeited any gender they had and replaced it with "cottage cheese in a tube sock". EDIT: Fixed slashes. I thought I was better than that. Apparently not.