My 15 month old daughter too sweats a lot. Though we stay in Bangalore where summer isn't too hot, i have observed her perspiring profusely during summer. I did not think this was unusual till I saw her sweating this winter as well, even at night. Though it is not very chilly in Bangalore during winters, it reasonably cold in the morning and at night. While rest of us don't prefer to be under a fan during winters, she likes to be under a fan as she feels warm and hot most of the times. All the while I was wondering what could be the reason for her sweating so much but it never occurred to me that it possibly could be because of her being a Thal major.