Habits of a Happy Brain: Retrain Your Brain to Boost Your Serotonin, Dopamine, Oxytocin, & Endorphin Levels

by Loretta Graziano Breuning

When a receptor is not used for a while, it disappears, which leaves space for any new receptors you may need. Flexibility is good, but it also means that you must use your happy receptors or lose them.