The blame for being squashed into a too-narrow plane seat belongs squarely with the airlines, who would pack us in vertically, standing on our luggage, to jam more of us in.
Or perhaps it belongs with everyone, to all those passengers who expect cheap travel to the ends of the earth and back, just for a vacation.
I must be obese too, then, as my BMI is 30. I don't overeat, I don't consume piles of chips or sugary soft drinks. I am not a couch potato, without a car that is impossible. Yesterday I walked at least 5 km, (mostly uphill) checking out our route for Friday, and tomorrow I shall do it again. Whenever I go out to buy a pint of milk, I walk a kilometre each way, the return journey being uphill with a bag of shopping.
And I don't reckon I give the impression of a humungous sweaty heap of bricks.