Because they activate "the nucleus accumbens and the ventral tegmental area". Ventral tegmental region (VTA) includes cell collections of dopaminergic neurons anticipating to the core accumbens, amygdala, hippocampus, and prefrontal cortex. These neurons are fundamentally involved in cerebrum components of reward, support, and passionate excitement. Their action has been firmly corresponded to the accessibility of essential rewards, for example, nourishment, water, and sexual conduct.