And I would argue, it's as or perhaps more important that thin men not enable or support hams:  In the case of fat women, it furthers their sense of entitlement/delusion, and they will just keep eating because they know that some human males are perverted/desperate enough to fuck/marry pigs even fatter than them.  In the case of fat men, evidently being unfuckable--even by fat women's standards--isn't enough to make them put down the fries, but being shamed by other men for their lack of masculinity might work.