Stress may increase desire for reward but not pleasure, research finds

http://medicalxpress.com/news/2014-12-stress-desire-reward-pleasure.html

Stress prompted chocolate lovers in an experiment to exert three times as much effort to smell chocolate than unstressed chocolate lovers, but both groups reported about the same level of enjoyment when they got a whiff of the pleasing aroma, according to the study, published in APA’s Journal of Experimental Psychology: Animal Learning and Cognition.