"Dopamine makes up less than one percent of the brain's neurotransmitters. It's a small portion. Dopamine is released when people are happy, angry, stressed. So it's really hard to call this specific neurotransmitter "the pleasure neurotransmitter.""

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Each of our cells is a living entity, and the main thing that influences them is our blood. If I open my eyes in the morning and my beautiful partner is in front of me, my perception causes a release of oxytocin, dopamine, growth hormones - all of which encourage the growth and health of my cells. But if I see a saber tooth tiger, I'm going to release stress hormones which change the cells to a protection mode. People need to realize that their thoughts are more primary than their genes, because the environment, which is influenced by our thoughts, controls the genes.

— Bruce H. Lipton