hope we aren't getting carried away!

Some, however, don’t accept the terms of carriage. We don’t trust the ‘carrier’. We choose not to travel on this train despite the fact there are virtually no other trains running. Society makes it difficult to jump off the train and they don’t allow us to change the route it takes, so we have to accept what we are given. Shape up or ship out. We have to accept the whole journey without question. We either commit to the moral norm or we abandon the whole thing altogether. If we leave, we then have to reappraise each moral code individually according to ethical instinct.
Ethics are like the rail network or rather the hills and valleys which determine the routes of the network. They may lead us towards the same end, but the difference is that we allow ourselves the opportunity to make our own choices - to take the fast route, a more scenic route, a low energy-consuming way or a less exploiting way. Each ethic is probably quite logical, otherwise it wouldn’t have survived for so long as a way to get to where we want to go to. Ethics are our compasses.
There are several ethical routes to choose from. The choice has to do with exercising free will. Morality deprives us of this element of choice. We are not meant to make judgments on nasty stuff we see. On the contrary, we should show obedience by smiling as we go about our business. Even when chewing the body parts of our beautiful brothers and sisters of the animal world. Morality demands obedience. It imprisons us, as it does the animals, on a one way, windowless, slow-moving train.