Ok, here's another one. Catgut? It's that string stuff that we had in tennis rackets which we often found in the back of the gargage. It was on old guitars. But is it made of CAT? YUCK!

The answer is no. If you believe this source.

Catgut or Gut, cord made from the intestines of various animals (especially sheep and horses, but not cats). The membrane is chemically treated, and slender strands are woven together into cords of great strength, which are used for stringing musical instruments such as the violin and the harp.