Just an aside. Duct Tape? you mean Duck Tape. Yes some people misheard it and called it Duck Tape. Silly because it is meant for Ducts. Or is it? Did Duct Tape start out for use on ducts and then find other uses?

Nope. It was originally used in WW II for sealing ammunition cases and was called DUCK tape. Like water of a duck's back: waterproof.

You can probably find this somewhere on the web.