The News
They love to make you mad
ANN ARBOR, Mich., March 16 (UPI) -- Some people find angry looks from others so rewarding they go out of their way to encourage them, Michigan researchers said.
"It's kind of striking that an angry facial expression is consciously valued as a very negative signal by almost everyone, yet at a non-conscious level can be like a tasty morsel that some people will vigorously work for," said Oliver Schultheiss, University of Michigan associate professor of psychology.
His study may explain why some people like to tease each other, he said.

The Research
Read the research behind this story in the journal Physiology & Behavior.