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.
In some cases, if a wedding band is worn on the right ring finger it is most likely a widower or widow, that shows respect by moving it from the left to the right. That is all it is. Wait, I thought pinkie rings were a lesbian thing, unless it's a signet ring on an Englishman.