This is a difficult one. Some people like to be pursued and chased. They like to skip away. Some people like to be chased by several people, none of whom have a chance of getting much closer. The code may indicate laziness or frustration. There are those who are not interested in the 'chase' and expect mutual responsiveness. There are those who are chasing hard but feeling that they are not getting anywhere. Code 12/6 is a direct way of expressing a common-enough feeling. It may seem a little demanding. In practice, a token of appreciation is all that is needed to keep the relationship going. It is also common experience that 'persistence' often pays off.