When was the last time you ate a Vanilla ice cream or just about anything that was vanilla flavored?
We never really wonder where its tasty flavor comes from.
So the answer is Castoreum. Castoreum is a chemical compound used in vanilla flavored foods and scents that come from a beaver's castor sacs.
These castor sacks are located between the pelvis and the base of the tail in beavers. Technically, it's butt.
This chemical compound is allowed to be used in food products under the name of 'natural flavoring'.