Trophallaxis is the transfer of foo or other fluids among members of a community through mouth-to-mouth (stomodeal) or anus-to-mouth (proctodeal) feeding. It is most highly developed in social insects such as ants, termites and bees. The word was introduced by the entomologist William Morton Wheeler in 1918. The behaviour was used in the past to support theories on the origin of sociality in insects.