Primatologists have noted that, due to their highly social nature, primates must maintain personal contact with the other members of their social group, usually through social grooming.
Primatologer har observerat att, på grund av deras starkt sociala natur, måste icke-mänskliga primater upprätthålla personlig kontakt med de andra medlemmarna i deras sociala grupp, vanligtvis genom grooming.