"it's your body and you are free to do as you please."
When obese people fly they rarely buy two seats. They can pretend that their state of health doesn't affect the people around them, but they are deceiving themselves.
I'm still technically obese, but better than I was. I'm big, but I'm not exceptionally wide. If I was an inch taller, I'd merely be "overweight". If I were 4 inches taller, I'd be pretty close to "normal" weight.
I fit in a standard airline seat without hanging over the armrest into the next seat, so why should I pay for it? So yeah, my state of health isn't particularly good right now, but it actually isn't affecting anyone I fly with.
Allow me to disagree; the capacity to generalize is at the core of much progress in human thought.
Of course there will always be those who insist on missing the forest for a tree or two -- the forest in this case being my attempt to keep in mind a wholly unoriginal thought: we are not isolated, and the state of our bodies and minds redounds not only to ourselves.
I fit in a standard airline seat without hanging over the armrest into the next seat, so why should I pay for it? So yeah, my state of health isn't particularly good right now, but it actually isn't affecting anyone I fly with.
Blanket generalizations don't do anyone any good.