I dunno. Protect your organs perhaps? An extra store of energy when you need to fight disease? Sounds reasonable to me. Thin people would have nothing to fall back on when needed. (No pun etc)
The nurse at the surgery told me, when I had a well-woman check-up - about 30 yeas ago. One remembers these things. 
*International Plastic Bag Free Day* tomorrow July 3rd
Only 50% of middle age adult manage more than 1 brisk 10 min walk a month.




So many surprisingly revelations about the agricultural and food industry over the last 40 years, but one medical matter that shocked me was watching the 40 year old presenter having an MRI to check how much internal body fat he had. He was shocked to find out he had far too much for his age, especially as he wasn't particularly overweight. I didn't know we could store so much fat inside our bodies with relatively little on the outside (IYKWIM). It left me wondering how much use our BMI reading is, as this is based on weight and height. 