I blame Charlie Brown2.k4 - Pet Rock / toy
I had one. It had a leash.
I mean, a guy became a multi-millionaire selling people rocks. Rocks! One of my favorite aspects was that it came in a box with airholes, so that it could breathe until adopted. I also loved the long instruction booklet that talked about how you could train it to follow commands. "Play dead" was my rock's best trick.
Did I mention mine had a leash?