But reciprocity thrives elsewhere too, because it is embedded in habits of thinking and rules of behaviour.
"Growing things is a profoundly nourishing experience - in every sense - and the City Corporation and its charity the City Bridge Trust wants to help embed the habit across the nation, helping thousands of people across a range of projects".
Whatever the reason, our want for more and inability to declare satisfaction is a habit embedded into the very fabric of our daily living.
The company says it uses the latest in behavioural science and weight tracking technology to change unhealthy lifestyles and embed healthy habits.
Helpful aspects of technology such as information, feedback, reward systems and automaticity have the potential to embed new habits in relation to self-management.
Meanwhile, the multi-factorial and complex nature of motivation was elucidated as was the potential ability of technology to provide information, feedback, reward systems and automaticity which could embed new habits in relation to self-management.
Patients described a continuous journey of success and failure where helpful aspects of technology such as information, feedback, reward systems and automaticity were attempting to embed new habits in relation to self-management.
Many of those traditions, of course, are borrowed from Europe, where raw-milk cheeses have long been embedded in eating habits and are more generally considered safe.
Watching Baltimore this summer and fall, you often got the sense that what some of the protesters were really after were not bad cops but bad habits embedded deep in the bureaucracy: where police officers patrolled and with what level of suspicion; how complaints of brutality were treated.
