No, unfortunately. Facebook doesn't store any chat besides what you can see. If you want to start storing your facebook chats, you have a couple options. You can download apps onto your profile that will allow you to store the chats and look at them later. You can also download an IM client like...
Only about 34% of Americans are obese, and about 32.7% are overweight, according to information posted by the National Center for Health Statistics. It may be relatively simple to lose weight, but it's even simpler to google "percentage of americans who are obese" and get your facts straight...