They think that way because they have all their limbs (for today anyway) and because they're not yet bed bound.They compare themselves to the even bigger and more disgusting death fats and think "erh muh gawd, I look so good, not like <insert useless FA blogger name here>, her fupa is down to her knees! I'm so tiny compared to her!" They're truly disgusting and they're up to their back tits in denial. That's why when they see a normal human out and about they become insta-triggeredTM.