@Rewire
Now that you want to get technical. Monkeys and Human, plus apes all belong to same class, Primates and same division Anthropoids. Anthropoids is further divided into Apes, monkeys and hominids; the latter with human origins. We resemble more like apes because of the missing tails but we all share same ancestors; unlike shark which you have to go too high up in chain to find the common root. Do YOU understand the difference now?

What I was pointing out was that it shouldn't be taken as a shocker since animals are already being used for such purpose.