sentences:  Should one member of the party react adversely to some ingested food, it may be advantageous (in a survival sense) for other members of the party to also vomit.This tendency in human populations has been observed at drinking parties, where excessive consumption of alcoholic beverages may cause a number of party members to vomit nearly simultaneously, this being triggered by the initial vomiting of a single member of the party.This phenomenon has been touched on in popular culture