When I first had a disposal, lo these many years ago, I thought it was OK to put anything down it.
I learned better very quickly. I put some raw fish skin down it. Little did I know that they just turned into a ball and just "bounced" around in the disposal every time i used it while everything else was being ground up.
It only took a couple of days for the ball o' skins to start stinkin'. It took me another day or so to discover where that smell was coming from. Then I had the pleasure of fishing around in there and get the stink-ball out. Yuck.
I don't learn fast but I do learn well.