brain Sophie Scott that laughter often is n't to do with bad jokes . In a joke , the person who laughs most is usually the one laughing . People are 30 times more likely to laugh if they are with someone else . It also triggers brain 's mirror region which explains why it is contagious .
Professor Sophie Scott says laughter often is n't to do with comedy value . In a conversation , the person who laughs most is usually the one talking . People are 30 times more likely to laugh if they are with someone else . It also triggers brain 's mirror region which explains why it is contagious .