Brown adipose tissue is present in small mammals (e.g., mice) and in newborn humans. Most of it disappears in adult humans. The cells in both types of fat are called adipocytes although they differ in origin, structure, and function in the two types of tissue.
On the left hand, index finger. It's not the index finger you wear it on. Left hand, ring finger. The finger that you would wear a wedding ring on.
Then after marriage when your husband has placed the wedding band on your LEFT ring finger then after the ceremony you, or your newly wed husband then places the engagement ring on your LEFT ring finger in front of the wedding band to protect the sacrament of marriage. So to sum it up: Right-Left-Left.