No it most certainly isnt, to break all the bonds in the glycerol you need to put in an enthalpy of +6974 and the energy released when the bonds reform is -5852, so you get less energy out then you put in so it wont burn.
The Ring Finger - The Meaning of the Ring Finger for Rings: Emotion, Creativity & Heart: Wearing a ring on the ring finger represents a connection to the heart, as it is thought to be closely related to the artery that goes to the heart. It is associated with our feelings of affection and love.
Ring Finger of the Left Hand . A promise ring is a promise of commitment and often precedes an engagement. Therefore many couples like to wear a promise ring on what is traditionally thought of as being the wedding ring finger -- the ring finger of the left hand. When engagement rings have been exchanged, the promise ring is then worn on another finger. Tip: Remember that every finger is a different size. The ring finger of a left hand may well be a different size to the ring finger of the right hand. Therefore if a promise ring is going to be an expensive purchase, it is worth considering whether the size of the ring can be altered if it will be worn differently in the future.