Imagine that you are walking in the park and you have just finished a soft drink. There are no waste bins to be seen anywhere. Just when you are considering throwing the empty can into the bushes, you remember that your mother would not approve. With this in mind, you will probably continue to look for a waste bin. Even when we are not in the company of others, we can feel obliged to keep to certain standards of behavior. Simply thinking about parents or a partner, for example, is enough to remind us how we should behave.