On a long car trip with my wife a few years ago, we went crazy and were talking about all kinds of strange things. Since we had passed many, many cows, we decided that cows aren't really that useful, aside from their meat. We also noted that horses are good for riding, but there's not much to do with them otherwise.
So we decided that someone should genetically engineer an animal that looks like a horse but tastes like a cow.
And, believe it or not, there were no drugs involved during this trip.