Chocolate contains theobromine, which can cause feelings of arousal. Also contained in chocolate is caffeine, a stimulant. Either one of these chemicals can be responsible for releasing dopamine, a powerful neuro-hormone which is principally responsible for all pleasurable sensations that we experience.
Therefore, eating chocolate ice cream is quite capable of reducing emotional pain. As to physical pain, just the numbing effects of cold ice cream ought to deaden more than a few nerve endings. So, that covers the physical end of things as well.
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