[spacesuitman2]

>The secret to staying slim is to not eat more calories than your body uses

This. There are too many people who do not understand that conservation of mass applies to the human body too. Nobody gains 1 kg by eating a single peanut, yet some people claim it's all genes.

[zepolen]

The genes affect their 'cant stop after eating that first peanut' syndrome.

Just like the will to live affects your 'cant hold breath forever' incapability.

I mean sure it's technically possible to hold your breath until you pass out, but it would take a crazy amount of will power.