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Exchange theorists argue that if one person does all the giving and the other does not reciprocate, the relationship is likely to terminate.
Narcotics
Psychoactive substances that tend to induce sleep or numbness and may lead to dependence or addiction, commonly used for pain relief.
Serotonin
A neurotransmitter in the brain that plays a key role in stabilizing mood, feelings of well-being, and happiness, also affecting digestion, sleep, and other bodily functions.
Endorphins
Natural chemicals produced by the body that interact with the brain's receptors to reduce pain perception and induce feelings of pleasure or euphoria.
Heroin
An opioid drug made from morphine, a natural substance taken from the seed pod of various opium poppy plants, often used illicitly for its euphoric effects.
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