Anhedonia – the inability to feel pleasure.
Another way to look at pain and pleasure is that few of our pleasures and pains derive out of thin air. The huge majority are formed from living in the experience of others – what our environment wants, we are attracted to, and what the environment finds abhorent, we find painful. We have no more command over how we are affected than is a bull with a ring through its nose, led this way and that. Our only freedom is in the environment we choose.