Four hormones which are called as Neurotransmitter and provide us comfort, happiness, feel good state of mind. Dopamine: is an important hormone of our brain’s reward system. It’s associated with pleasurable sensations, along with learning, memory, and more. Serotonin: is an hormone which helps regulate our mood like sleep, appetite, digestion, learning ability, and memory. Oxytocin: is also an hormone which helps us for childbirth, mother's milk and strong parent-child bonding. It can also help promote trust, empathy and bonding in relationships. Physical touch, shake hands, hugging, staying close etc improvise a sense of security and trust with other humans due to this hormone Endorphins: are hormones which helps us in overcoming physical pain or it is a pain reliever or pain killer, it secretes in response to stress or physical discomfort. This hormone can be increased by reward-producing activities such as eating, working out, gym or physical work activities, military training...