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[David75]

Cause they can't (exercise). Some people just don't have the willpower to actually exert effort. I almost can't blame them, since it seems like a hereditary disability for most, like being born blind or something.

Yup, many disorders drain you willpower/energy.
I have one, I know what it is like and it's very difficult to fight.

But no way I would willfully have a tapeworm.

[XanBcoo]

Yup, many disorders drain you willpower/energy.
I have one, I know what it is like and it's very difficult to fight.

Either those and many other girls have a common mental disorder which disallows them to exert physical effort, or they are completely lazy morons duped by images in popular media and living in a society that expects instant gratification.