Dutch and Canadian study peaked at 100 men and women . Meals gave the impression they were with ' warmer ' and ' more ' likeable ' , without the possibility of ' feel - good ' chemical serotonin .
Dutch and Canadian study looked at 100 men and women . Meals made the person they were with 'warmer ' and 'more 'likeable ' Chewing raises the levels of 'feel-good ' chemical serotonin .