I guess the first thing I would like to point out is the fact that the airline is partially at fault. Okay, maybe not the airline, but the manufacturers of the planes in general. I know for a fact back in the 60's and 70's the space in the cabin used to be much better for passengers. Now it is all a huge money grab and they try to smash as many people in as they can. They don't care about comfort or safety or any of that. It is all about selling as many seats as they can. I am over weight. Some would probably call me fat, I don't feel super huge, but at 250lbs there have been times I have been worried my seat belt wasn't going to buckle on a flight. Maybe it just has to do with where I carry my weight. I often wonder if people who know they are bigger buy two seats just out of common sense. I know that is a lot of money for some people to spend, but it would be for their own comfort as well. Who wants a arm rest playing huggy huggy with their gall bladder for three + hours?