When a person falls in love, a network of 12 regions of the brain are activated. The system is responsible for the emotion, reward, and intellectual stimulation of love.

当一个人坠入爱河，联系大脑中12个区域的网络就被激活了。这个系统负责感情，奖励和爱情的智能刺激。

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"Coffee makes us feel so good because it is able to tap into virtually every reward system our brain has evolved," Wenk writes. When it comes down to it, coffee certainly isn't going to kill you.

“喝咖啡使人感觉很好是因为它能刺激大脑已进化的每一个奖赏系统”温克写道，当然，归根结底喝咖啡不会致命。

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"Coffee makes us feel so good because it is able to tap into virtually every reward system our brain has evolved," Wenk writes.When it comes down to it, coffee certainly isn't going to kill you.

“喝咖啡使人感觉很好是因为它能刺激大脑已进化的每一个奖赏系统”温克写道，当然，归根结底喝咖啡不会致命。

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Researchers say they observed shortages in the brain's reward system in patients with A.D.H.D.

VOA: special.2009.09.29

Generally, acts of self disclosure were accompanied by spurts of heightened activity in brain regions belonging to the meso-limbic dopamine system, which is associated with the sense of reward and satisfaction from food, money or sex.

WSJ: The Science of Bragging and Boasting