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.
It does not matter. A purity ring is a ring that represents a promise, vow, commitment or goal to abstain from sex until marriage. Purity rings are typically worn on the left ring finger. It is significant, in the fact that it is the same finger on which a wedding ring is worn.