RE: Why do you think Asians are skinnier?
You know, about a century or more ago back in China, if a person was fat, everyone would idolize him or her because they're eating well.
It's true that asians eating rice may cause them to be skinnier not to mention Buddhism existed in Asia (and still does) so as the continent modernized, some countries retained their vegetation eating habits.
However, I would have to disagree with Legend about the not sleeping enough part. The diet affects a person's sleeping patterns and results.
That's why people get hangovers the next morning or people who eat a lot, the fat is stored in the body overnight.