唔通你同佢係中學同學? --> I don't think so, but this high school friend of mine has a busy work life (travelling quite a bit). With no kids and constantly on the road, it's hard not to get big. We're almost 40 and our metabolism just isn't as good as it used to.
He was a skinny kid in primary school; 30 years later i think he 'expanded' 2-3 times