I wouldn't be worried. Tubby did this forever with a pair of slippers I had that looked like Elephant feet. Those slippers started out in Green Bay, WI and ended up in Chicago, IL because I knew how much Tubby loved them so I just couldn't get rid of them. I don't know whatever happened to them though. I know I had them in my last apartment, but I don't ever remember them being in our current abode. I must have finally decided enough was enough and gotten rid of them. Ever since then Tubby hasn't "mounted" anything that I know of, but he does yowl a lot....hmmmm......maybe I need to get another pair of slippers to diminsh the yowling.....anybody know how to get a cat to get the "urge" back again?