Joke explanation:

Au is the symbol for gold. So without the A, the cat only wants U

Uranium?

I wnt gold

Well, how does it feel to wnt?

helium helium

I thought the joke was that you just wanted gold lol

Was trying to figure out what urum (Aurum/gold without the A) could mean, then I remember the abbreviation...

Aww, shucks

I didn't realise the joke until I read the community.

This is a tungsten joke